Yes this is a reupload. I fixed some errors in the video. Why were there errors, you ask?! Making frequent science videos is a complicated process: - I don't know everything in physics - Sometimes I work too fast and the facts suffer. Plz send your thoughts and prayers to the facts - I don't know how to spell homogeneous
This is how science works. Errors are made and corrected. Our understanding both personally as well as for all humankind changes. Science grows. Congrats on doing the scientifically right thing.
Jo P Hmm.....You/She Are surmising that there was no Earth yet! Science keeps changing it’s mind on everything...Maybe it is all a simulation, Therefore “The days before” no longer applies!
@@laikapupkino1767 indeed - some under PG's comment about this being a re-upload are... wow. Like they're on an acid trip as they type their comment, or having a stroke. They're _bad!_
@@TommoCarroll Why would they even think pigeon poop would make noise in the first place? They were physicists, so they did know that poop would only attenuate such a signal, not cause it???
Dr. Maddie Just count the goose bumps...or? Is it a rash? Or did I really shiver all over or was it something cold that I did not realise I touched it? Oh I know! I just ate an ice cream with chocolate covering and it was warm..otherwise it would have melted. Did I really have little dimples all over the ice cream as well....Better take An Echinacea just in case...or will that give me more goose bumps....or is it a rash that will react against My echinacea...better take a pill just in case my goosebumps are really the new flue virus! Ah I know I have been dreaming all along!
A really underrated part of this video is how you take time to explain all the science-y jargon (fancy words). Also, it's always helped me conceptualizing the red-shift to think about an ambulance moving towards or away from you. If you listen to the sound next time an ambulance passes, it will sound deeper (longer waves="red shift") as it moves away from you than when it moves towards you!
You mean to say, she is dumbing everything so far down that even US-Americans could understand the matter at hand.
4 ปีที่แล้ว +2
It's a trip knowing that the effect on old CRT televisions not receiving a dedicated signal, which was commonly referred to as snow, is actually cosmic microwave background noise. As someone who is 50, I grew up with several generations of CRT televisions. The effect was always the same.
Lokesh Kumar which leads to the question what time exactly is? and why that concept of time was mathematically sucha successful story, even when it was just an idea.
@@atomaalatonal personally, I think time was onlymade for when doing things when the egyptians were a thing, how long would it take? time it, how long will the stones to come here? time it, makes things efficient and in order...
I learned about the Holmdel horn antenna probably 25 years ago. I remember the theory about the pigeon droppings being the cause of the interference, but to no avail. I like watching your videos because you make the information fun. Sharing information with great enthusiasm and a huge smile make it very enjoyable. Great job Dianna!!
Thanks for that. She mentioned New Jersey, but never the specific place, Holmdel (also home of the Garden State Arts Center concert venue). Yours is what I was looking for in the comments!
"There is a small percentage of the snow static you can see is due to the CMV" I immediately go to my grandparent's old TV and turn it on to see for myself. :D
If you really do that and stare hard enough, you can see all sorts of patterns. Troops of snow dots marching across the screen. I used to see oval-shaped disks slowly spinning around on a 45 degree axis. You can see anything you want, really.
I watched a documentary that detailed the TV thing. Basically said that with the brightness turned down 1% of the snow was cosmic background radiation.
One of my favorite things I learned about CMBR in undergrad physics is what it means to detect a uniform temperature, no matter where we point the detector. As I remember it, the uniform temperature is a critical piece of evidence for the Big Bang. If it wasn’t an explosion from a point source, then we’d be able to detect different temperatures across the background - but since it’s a uniform temperature no matter where we point the detector, then the universe is expanding at the same rate in every direction, and therefore is the result of a Big Bang. I was hoping you’d mention that, and now I’m wondering if I have it wrong. Also, thank you so much for making these videos!
There's an lecture video about the slight temperature differences in the CMBR. Below is the link with the time set to the section of the video where they talk about the temp differences (tiny amounts K) and why they are essential. th-cam.com/video/1loJTy6bOu8/w-d-xo.html
My 12 year old daughter refuted my mum when my mum was on a rant about how you shouldn't open the microwave oven door without turning it off first, because the radiation is dangerous... my daughter's words, "Clearly someone doesn't know the difference between ionising and non-ionising radiation!"
microwave in small amounts won't do anything at all because as your daughter said it is non ionising but when large amounts of it are present like the microwaves coming from a microwave oven in that wavelength would make your water molecules and boil you from inside out but i imagine there wouldn't be any microwaves being emitted when its finished microwaving you've got a smart daughter
@@mastershooter64 You'd have to be inside the resonation chamber or have a microwave laser pointed at you for it to boil your flesh or even heat up your molecules.
@@deluxeassortment but why is there a metal plate full of tiny holes smaller than the wavelength of the microwaves behind the glass ? Is it like only partially safe without it ?
I wish I had a time machine to go back to when the universe was 25C everywhere (roughly 15M years after time 0). I wonder if the pressure was also 100kPa instead of near vacuum. It would be nice to go on a spacewalk in one's shorts. Or space streak if you're really feeling adventurous. Granted no stars yet so might not be much to see. Oh yeah, no oxygen yet either, oops.
You are very fun to watch, love your videos so I am watching them all again. That noise is a pain for the microwaves for communication between buildings, etc.
No coincidence.. read up on this topic.. either you will help 1 person or many.. if it comes up 1 more time equalling 3x really pay attention.. Yes I know how I sound.
Sweet Leaf Hmm....Yep....Science knows 1% of what is to know...knows 99% of what is to know, but knows 0% of what is Unknown! Blinded by the Unknowns Of Science, And Scientists....Who keep changing their position on Everything anyway---Even Though it is only an assumed 1% of the unknown 99%....Get your Flue jab....even though there are millions of unknown flue types out there! One of you might? Benefit from the unknown’s Of Science......Maybe?
Assuming the CMBR is a nice legible signal as depicted at the beginning of the video, what would happen if you used multiple time-synchronized detectors to determine the direction of travel of the signal? Presumably the answer is as simple as "the CMBR does not form a nice legible signal and is effectively noise at all frequencies such that no two signals, even when time-synchronized, can be compared by either the direct time-domain signal or by its spectral decomposition."
I remember learning about this in school... given that it was in the 60s, they immediately thought it was something nefarious that the Russians were doing - height of the Cold War.
@@pieterbezuidenhout2741 The Soviets had some seriously dangerous technology and the west didn't know how much. We know the USSR had an inefficient system, but it did have decent scientists (cough, post-Lysenko) and had satellites, jamming technology and WMD. And no, not all of it was stolen, they innovated some things too. Thirty plus years ago they were seen as a serious threat.
@@CarmenBrunnaDuarte OK 2 points here- 1) Do you know who Procol Harum are? 2) Your calculation of the color chart at 4000k being pale orange is based on current cosmological conditions. Pressures at the time of the recombination greatly exceed those now experienced and may have drastically altered wavelengths at that time giving a different 'color' for temp. Just a thought.
Pumpkin spray tan again today Mr. President? "No they keep making fun of me. Let's go with see me pee kale orange." Sir, I think you mean CMB pale orange. "No CMB is fake news from China with their new fake huuuge antenna. It's actually a very tiny antenna, so tiny, and used to steal Fox News from DirecTv. It's see me pee. I love pee, people love my pee, it's orange and tastes like tang. I have the best pee, best pee. Now I want you to pee all over me and don't miss a spot." Sir, when are you going to deport me like you promised...
Dianna, I thoroughly enjoy your videos and look forward to each one. You explain things in such a way that is understandable. It still make my head hurt trying to wrap my brain around some of it, but I hope you keep giving us this great content for a long time!
I wish we had teachers like Physics Girl back when we were in school. I would've learned soooo much more and probably would've became an astrophysicist myself. *sigh* Thank you for explaining all of this in such a great, interesting and fascinating way. Much love from the Dominican Republic!
I am old enough to remember when the cosmic background microwave radiation was discovered. I was in grade school at the time. The space program was really exciting at that time, and anything to do with space was fascinating to me. At the time, the science textbook I learned from presented the big bang theory alongside the steady state theory. but with discovery of the CMB the steady state theory fell out of favor.
I heard somewhere that the CMB can be used to estimate the size of the entire universe. Not just the visible universe. How is it then that we can see the CMB everywhere, but we know there are galaxies that we will never be able to see?
The cmb can't be used to estimate the size of the entire universe, the best it can do is estimate the curvature of our observable universe which might indicate the size of the universe, but not really since we can't actually see what's behind the observable universe to confirm this.
4:14 - wait. Dry shampoo? I’m sorry, I realize that the origin of our existence is pretty important, but I really need to know more about this dry shampoo you speak of.
@@karanbirsinghbhullar No it really isn't. It's corn starch and a number of other things in an aerosol can. Designed to be sprayed on hair where it attaches to the oiliness, then can be brushed out.
Fun fact - the "temperature" of the background (2.7 K) corresponds to a light frequency of 56 GHz. That's actually *more* energetic than a typical household microwave oven (which operates around 2.45 GHz, the same as a lot of wifi devices). If you could concentrate the CMB with a giant microwave magnifying lens, you could actually heat up food (or pop popcorn) with it! (e\ the 2.45 GHz of your wifi or microwave has an equivalent temperature, via the Boltzmann constant, of only 0.12 K)
Excellent explanation of this very complex subject! Another way to think about the cooling of the CMB is that the expansion of space stretches the light, increasing its wavelength, decreasing its frequency, and decreasing its temperature. Very cool! (Cool? - no, super-cold!)
The age of the universe is determined using two different methods: 1- By studying the oldest objects within the universe . And 2- By measuring how fast it is expanding. But can't we just measure what we can see, or rather what our instruments reach? What if there's more Universe beyond the, well, Universe and we simply can't see it and therefore measure because the light is too far and expanding too fast to reach us?
"it's EVERYWHERE".. How do we know? Have we actually looked everywhere? I thought that the universe is pretty big and we only discovered a small portion of our solar system.. Another thing I don't understand is this: if the source of CMBR is the light that "got out" shortly after the big bang, and we can detect it continuously, not just as a pulse, then it means that something is still producing that light, right?
Remember this information is just a guess based on inaccurate knowledge. No one knows for sure and they talk like they have all the answers. People are so gullible and listen to this whole heartedly as truth!!!!
As the universe is expanding, the peaks and dips of the wave are going farther apart, causing the red shift. The shift is due to the expansion of the universe.
"This thing is - 270 degrees C and everywhere." Ooh, ooh, I love Jeopardy! I got this one: What is the cosmic microwave background? Did I solve Behind the Stars 500?
Energy does not simmer down, it flows like a frequency being turned up in volume, and down, upward spiral, downward spiral, positive energy, negative energy, constantly transferring
As a woman, you have no idea how happy it makes me to have found your channel. All the other channels are men's. My comment will get lost among the others probably, but if you ever get to see it, thank you thank you thank you !
the CMB is not everywhere in the universe at all times, but omnidirectional. that is a big difference, as you can shield yourself from it like from any other kind of radiation. make a cube out of metal walls --> no cmb inside the cube. now dark energy on the other hand ...
Haven't watched the other video on it which you suggested, but compressed canisters like that don't really get cold because of compressed gas expansion so much as the state change of the propellant (usually propane, butane, or a mix of the two) boiling from liquid to gas. Which I guess is also expansion, rather different from what you were talking about when you made the analogy.
It's refreshing to see a girl more excited about physics than makeup on utube...Ur enthusiasm is what keeps me hooked...it really shows that you're so passionate about what you do💝
Reminds me of Horton hears a who. I seriously have pondered upon a similar scenario. Our universe is bewildering indeed. Also this cosmic dust signal (cmbr) makes me think of Star Wars and the concept of chi (which I think George Lucas might have been inspired by).
Hello physics girl I am impressed by your ability to describe such different topics in physics. Many of your videos I have watched and my knowledge has been pieced together into a good overall picture. Now I have some curious questions that I hope you want to answer about this video. 1.It seems strange to me that the temperature "only" goes down to minus 270 degrees but in stars the temperature can be millions plus degrees. I have read somewhere that the electrons can no longer jump between different shells in the atom and therefore the reaction stops, or are there other reasons. But metals become superconducting so the magnetic force cannot disappear and thus neither can the electric field force? 2. Does any change in gravity occur or does it have the same impact in minus 270 degrees, or does it become dark energy that controls? 3. From what I understand, no more matter can be created in the universe but what comes into being in the big bang, elemental particles are reshaped/merged into stars. But surely when the universe expands, "voids" should be created between matter, and surely this void should consist of "something"? Is it the "time" that has elapsed that is the void, but is it this "time" that we cannot yet measure as matter? Many Greetings from Sweden
Basically: relative to the path the Earth would follow if it were to perfectly flow with the universe's expansion. The Earth orbits the Sun, and the Sun orbits the Milky Way, and the Milky Way is attracted to nearby galaxies (like Andromeda). This movement is evidently different from what the Earth would do without those other factors. In that case, it would perfectly flow with the universe's expansion. Imagine your surrounded in a circle by those tennis ball dispensers. They are all constantly shooting their tennis balls to the center at the same velocity. If your standing still w.r.t. the tennis ball dispensers, then every tennis ball from any direction would hit you just as hard. But if you started moving in some direction, the tennis balls in that direction would hit harder compared to those from the opposite direction. The tennis balls are the light from the CMB and the tennis ball dispensers are the stuff where that light originated from. You are the Earth in the middle. That's how we measure our speed relative to the CMB. Of course in this analogy there is no explicit 'expansion of the universe' but I hope you get the picture.
I've always wondered why everyone talks about CMB as the beginning of the universe (implying the red-shifting has only so far stretched to microwave levels) but _nobody_ went ahead to test for lower wavelength backgrounds. After all, light that already existed in the microwave band at the beginning couldn't have remained microwave after all this time, correct? Sure they would've red-shifted to longer radio wavelengths by now.
You don't actually need sophisticated equipment to detect those signals. All you need is an old TV set and an old aerial antenna then tune in on an unoccupied channel, (i.e. the channel that has no television broadcast) and you will get the cosmic radio noise that the scientists and astronomers are getting.
4:37 Fun fact but still nice to know: actually Hydrogen, Helium and some noble gases are the only exception to that since they are the only gases that get hotter while expanding. Thats also the reason why Hydrogen is able to selfignite when leaking out of a gas bottle or a supplyline. So next time you're working with Hydrogen you better check for leaks! ;)
So if you turned off the CMB what would the temperature of our section of space be? Has the heat and light that originally bathed our region of space now completely gone?
The initial discovery of the CMB is one of the most real life examples of "not seeing the forest for the trees". These researchers being stumped by weird, pretty uniform waves being everywhere instead of the specific waves they wanted to look for, only to realize that their instrument is correct: we're just so totally surrounded by these microwaves.
8:26 blew away my mind. What? Is the cosmic microwave background redshifted in one direction and blueshifted in the opposite direction? Does that mean that if your making a spaceship that reaches a situation at which the CMB is not redshifted and blueshifted in any direction it is at rest according to the universe. When away form any massive body. The time meassured at that moment is the basetime of the universe and the ditances measured them are the base distances. Or am I wrong? Why?
if you use microwaves to hear food up, why can you not some other wave to freeze or at least fast cold. always wondered about this. instant ice cream instead of waiting hours for the same product.
I am, sadly, one of Sheldon Cooper"s "Dirt Diggers" and have been so for almost 40 years (B.S. Earth Sciences, Penn State 1981 and Georgia Tech, M.S. Seismology, 1991). Thus, I note that I am very grateful for your funny, but very educational video shorts. Thank you and best wishes!
Yes this is a reupload. I fixed some errors in the video. Why were there errors, you ask?! Making frequent science videos is a complicated process:
- I don't know everything in physics
- Sometimes I work too fast and the facts suffer. Plz send your thoughts and prayers to the facts
- I don't know how to spell homogeneous
No problem!
It's h, o, m, o, g, e, n, e, o, u, s.
I appreciate that science communicators like yourself and Kyle Hill of Because Science don't pretend to know everything and actively say as much.
F
Physics Girl You’re only human!
This is how science works. Errors are made and corrected. Our understanding both personally as well as for all humankind changes. Science grows.
Congrats on doing the scientifically right thing.
I remember watching a documentary about those two guys, I thought it amusing how they referred to pigeon poop as "white dielectric material"
they probably thought it was amusing too
😅...i wonder what they called their poop as then...?
Yellow Multielectric Material...🤪
@@gauravjha8938 you need to go to a doctor, that is usually a very serious symptom.
@@gauravjha8938 idk, you should change your diet. Human poop isn't supposed to be yellow...
@@gauravjha8938 Your poop is.. yellow?
"Before there were days"
"Because there was no Earth yet"
I loved that!
Jo P Hmm.....You/She Are surmising that there was no Earth yet! Science keeps changing it’s mind on everything...Maybe it is all a simulation, Therefore “The days before” no longer applies!
Or rather everything was day because there was light but no Earth to cast a shadow :-)
zapfanzapfan Whose eyes to see the light?
@Robert Rudd The customers of Big Bang Burger?
zapfanzapfan Hmm...Always wondered why we have the Equator...the centre of the big bun!
It's been so EVERYWHERE that you don't need a Where. You don't even need a When. That's how EVERY it gets.
We can make a religion out of this!
Just a reminder:
ThE SuN Is A DEaDlY LaZEr
@@miratparmar6779 it's a STAAAAAAR
@@edrumsense Shame he doesn't make more videos, huh?
@@miratparmar6779 So sad :-(
The most interesting channels are always about physics.
And some of the most ludicrous comments (I don't mean yours) are about physics as well.
@@laikapupkino1767 indeed - some under PG's comment about this being a re-upload are... wow. Like they're on an acid trip as they type their comment, or having a stroke. They're _bad!_
Kinda hard to avoid phyzzicle stuff! (God).
Chemistry channels: hold my ethanol!🍺
"Alas, it was not poop..." Dianna Cowern 2020
A quote that shall go down in history!
@@TommoCarroll Why would they even think pigeon poop would make noise in the first place? They were physicists, so they did know that poop would only attenuate such a signal, not cause it???
A fame-worthy quote for sure lol
Surely a different poop from the ones from CERN & the LHC. 😉
Well, you never know. Pidgeons could have accumulated radioisotopes or something ridiculous. Just keep the equipment clean and in working order :)
Every time I think about how complex yet beautiful our universe is, it gives me goosebumps.
Universe - Only two things
1. Space
2. th-cam.com/video/A3SSf-PoBg4/w-d-xo.html
That's just a rash from the plasma storm it'll clear up when the sun runs out of helium.
@@johnm.v709 i mean its dangerous out there only earth is a safe planet.
Dr. Maddie Just count the goose bumps...or? Is it a rash? Or did I really shiver all over or was it something cold that I did not realise I touched it? Oh I know! I just ate an ice cream with chocolate covering and it was warm..otherwise it would have melted. Did I really have little dimples all over the ice cream as well....Better take An Echinacea just in case...or will that give me more goose bumps....or is it a rash that will react against My echinacea...better take a pill just in case my goosebumps are really the new flue virus! Ah I know I have been dreaming all along!
Dave Alexander GOD....Go On Dave......Dave On Gravity......Great Overriding Deity!
_"There's this thing that's all around us. Literally everywhere at all times"_
*Me:* Duolingo
The force is all around us... it binds us and holds us together... Star Wars had it right.
@@vansantosdaddy Use it wisely to make popcorn or heat soup.
Related to the Higgs Boson?
oh, god?
Trivago?
A really underrated part of this video is how you take time to explain all the science-y jargon (fancy words).
Also, it's always helped me conceptualizing the red-shift to think about an ambulance moving towards or away from you. If you listen to the sound next time an ambulance passes, it will sound deeper (longer waves="red shift") as it moves away from you than when it moves towards you!
You mean to say, she is dumbing everything so far down that even US-Americans could understand the matter at hand.
It's a trip knowing that the effect on old CRT televisions not receiving a dedicated signal, which was commonly referred to as snow, is actually cosmic microwave background noise. As someone who is 50, I grew up with several generations of CRT televisions. The effect was always the same.
5:02 "back in the day, when there were no days."
Lokesh Kumar which leads to the question what time exactly is? and why that concept of time was mathematically sucha successful story, even when it was just an idea.
@@atomaalatonal personally, I think time was onlymade for when doing things when the egyptians were a thing, how long would it take? time it, how long will the stones to come here? time it, makes things efficient and in order...
Lokesh Kumar Well at least she is telling 12 year olds about the 1960’s.
I learned about the Holmdel horn antenna probably 25 years ago. I remember the theory about the pigeon droppings being the cause of the interference, but to no avail.
I like watching your videos because you make the information fun. Sharing information with great enthusiasm and a huge smile make it very enjoyable.
Great job Dianna!!
Thanks for that. She mentioned New Jersey, but never the specific place, Holmdel (also home of the Garden State Arts Center concert venue). Yours is what I was looking for in the comments!
I could see this antenna from my bedroom window.
5000 people worked in one building which more than doubled Holmdel's population during the day.
Randy Behrmann Hmm..She is stuck in the 1960’s....Not the 1995’s...Seventy years on .....still no change here then!
"This thing is -270°C and is EVERYWHERE"
Is it my ex?
how many times are you going to make this same joke
@@benchasinghorizons9428 ...once?
Looks like Ben is dating you ex now m8.
Dead
Yes
Your narration is amazing. Even non-physics persons will enjoy & learn.👍👍
Truly " happy physicsing ".
"There is a small percentage of the snow static you can see is due to the CMV" I immediately go to my grandparent's old TV and turn it on to see for myself. :D
I did that over 35 years ago,friends.
If you really do that and stare hard enough, you can see all sorts of patterns. Troops of snow dots marching across the screen. I used to see oval-shaped disks slowly spinning around on a 45 degree axis. You can see anything you want, really.
@@roytee3127 i once saw a little man running and eating mushrooms getting bigger and saving princess...
Didn't out ever watch poltergeist? Don't watch static.
I watched a documentary that detailed the TV thing. Basically said that with the brightness turned down 1% of the snow was cosmic background radiation.
That purple book on your shelf really says it all: “We have no idea.”
Woah
what an observation, here take a nobel prize for it
I have the audiobook. It’s very good... and very humbling.
Wow man ur eyesight
By Jorge Cham. Great cartoon book!
One of my favorite things I learned about CMBR in undergrad physics is what it means to detect a uniform temperature, no matter where we point the detector. As I remember it, the uniform temperature is a critical piece of evidence for the Big Bang. If it wasn’t an explosion from a point source, then we’d be able to detect different temperatures across the background - but since it’s a uniform temperature no matter where we point the detector, then the universe is expanding at the same rate in every direction, and therefore is the result of a Big Bang. I was hoping you’d mention that, and now I’m wondering if I have it wrong. Also, thank you so much for making these videos!
No, you're correct, as best I understand it. I watched a video on the subject by Fermilab earlier, and they did mention that.
There's an lecture video about the slight temperature differences in the CMBR. Below is the link with the time set to the section of the video where they talk about the temp differences (tiny amounts K) and why they are essential.
th-cam.com/video/1loJTy6bOu8/w-d-xo.html
My 12 year old daughter refuted my mum when my mum was on a rant about how you shouldn't open the microwave oven door without turning it off first, because the radiation is dangerous... my daughter's words, "Clearly someone doesn't know the difference between ionising and non-ionising radiation!"
microwave in small amounts won't do anything at all because as your daughter said it is non ionising but when large amounts of it are present like the microwaves coming from a microwave oven in that wavelength would make your water molecules and boil you from inside out but i imagine there wouldn't be any microwaves being emitted when its finished microwaving you've got a smart daughter
Smart kid!
@@mastershooter64 You'd have to be inside the resonation chamber or have a microwave laser pointed at you for it to boil your flesh or even heat up your molecules.
And then she was grounded....
@@deluxeassortment but why is there a metal plate full of tiny holes smaller than the wavelength of the microwaves behind the glass ? Is it like only partially safe without it ?
I wish I had a time machine to go back to when the universe was 25C everywhere (roughly 15M years after time 0). I wonder if the pressure was also 100kPa instead of near vacuum. It would be nice to go on a spacewalk in one's shorts. Or space streak if you're really feeling adventurous. Granted no stars yet so might not be much to see. Oh yeah, no oxygen yet either, oops.
Underrated comment right here!
I once had an anxiety crisis and heard an incredibly loud white noise that lasted for almost one minute. No one else in the house could hear it.
8:38 that "Tha's fast" made me smile
Dude I love this. Your delivery and presentation would’ve come in wicked handy in my physics class in college lol. Kudos.
How do you organize a space party?
You planet.
Edit : I've also recently started a TH-cam channel based on science.
Ba dum tss
alright you may enter. 😎
I wouldn't bother going though, it's a rubbish party - no atmosphere.
how do you leave a space party?
you microwave goodbye to everyone in the cosmic background.
😂😂😂😂😂😂
You are very fun to watch, love your videos so I am watching them all again. That noise is a pain for the microwaves for communication between buildings, etc.
13,5 billion years ago a cosmic egg was put in a microwave oven, making a universal mess.
Matter is the small yolk, and dark matter is the transparent albumen. The shell bits are simply beyond the edges of the observable universe.
Sounds plausible. Hence the cosmic egg theory.
What came first, the chicken or the egg? ...lol...
@@oldschoolman1444 Always the egg :)
I was just reading " a brief history of time " which also had this info and I found your video , what a coincidence
Hey, me too!
No coincidence.. read up on this topic.. either you will help 1 person or many.. if it comes up 1 more time equalling 3x really pay attention..
Yes I know how I sound.
Because the google algorithm can read minds.
OMG TH-cam recommended to me this video exact while I'm reading this book in this chapter. Wow
Yes
She blinded me with science, and hit me with technology
Ironically it sounds like you are trying to explain you were hit by a laser guided bomb.
It’s poetry in motion
Roger Jones Hmm...Blinded by Science.......Move On From the 1960’s my friend....That is all this is about!
Sweet Leaf Hmm....Yep....Science knows 1% of what is to know...knows 99% of what is to know, but knows 0% of what is Unknown! Blinded by the Unknowns Of Science, And Scientists....Who keep changing their position on Everything anyway---Even Though it is only an assumed 1% of the unknown 99%....Get your Flue jab....even though there are millions of unknown flue types out there! One of you might? Benefit from the unknown’s Of Science......Maybe?
Sweet Leaf Hmm...Tea.....Never mind .....The 80’s is long gone or had you not noticed. Prefer coffee myself!
Assuming the CMBR is a nice legible signal as depicted at the beginning of the video, what would happen if you used multiple time-synchronized detectors to determine the direction of travel of the signal? Presumably the answer is as simple as "the CMBR does not form a nice legible signal and is effectively noise at all frequencies such that no two signals, even when time-synchronized, can be compared by either the direct time-domain signal or by its spectral decomposition."
You do such a good job of explaining complicated things. Awesome teacher 🤘
I remember learning about this in school... given that it was in the 60s, they immediately thought it was something nefarious that the Russians were doing - height of the Cold War.
Being ' Scared ' of the Russians they're always blamed by the Yellow bellies.
@@pieterbezuidenhout2741 You know nothing of history, huh?
@@pieterbezuidenhout2741 The Soviets had some seriously dangerous technology and the west didn't know how much. We know the USSR had an inefficient system, but it did have decent scientists (cough, post-Lysenko) and had satellites, jamming technology and WMD. And no, not all of it was stolen, they innovated some things too. Thirty plus years ago they were seen as a serious threat.
In the time of the recombination, the light that was released was a pale shade of orange (rgb 255, 209,163; hex #ffd1a3).
#TheBlackIsTheNewOrange
According to Procol Harum it's actually "A Whiter Shade of Pale".
@@charlesdahmital8095 The radiation temperature of the recombination was 4000K, which gives a pale orange.
@@CarmenBrunnaDuarte OK 2 points here-
1) Do you know who Procol Harum are?
2) Your calculation of the color chart at 4000k being pale orange is based on current cosmological conditions. Pressures at the time of the recombination greatly exceed those now experienced and may
have drastically altered wavelengths at that time giving a different 'color' for temp.
Just a thought.
Pumpkin spray tan again today Mr. President?
"No they keep making fun of me. Let's go with see me pee kale orange."
Sir, I think you mean CMB pale orange.
"No CMB is fake news from China with their new fake huuuge antenna. It's actually a very tiny antenna, so tiny, and used to steal Fox News from DirecTv. It's see me pee. I love pee, people love my pee, it's orange and tastes like tang. I have the best pee, best pee. Now I want you to pee all over me and don't miss a spot."
Sir, when are you going to deport me like you promised...
@@illumiNOTme326 Unlike your cousin when you two get together, finishing is not hard for you
Dianna, I thoroughly enjoy your videos and look forward to each one. You explain things in such a way that is understandable. It still make my head hurt trying to wrap my brain around some of it, but I hope you keep giving us this great content for a long time!
I wish we had teachers like Physics Girl back when we were in school. I would've learned soooo much more and probably would've became an astrophysicist myself. *sigh* Thank you for explaining all of this in such a great, interesting and fascinating way. Much love from the Dominican Republic!
I am old enough to remember when the cosmic background microwave radiation was discovered. I was in grade school at the time. The space program was really exciting at that time, and anything to do with space was fascinating to me. At the time, the science textbook I learned from presented the big bang theory alongside the steady state theory. but with discovery of the CMB the steady state theory fell out of favor.
Thank you, I love how you explain science!
She's so respectful of our vast knowledge and years of training: Phyzzlers! lol
I found Simone and she led me to you. Subbed to both of you. You too make TH-cam so much better. Keep it up. love your videos.
I love your videos. It's wonderful watching someone be so excited about science.
This young woman is brilliant and presents interesting stuff so articulately. Thank you for sharing, bright you are.
I love the passion in your reactions! You truly are into science. Keep it up Physics Girl!
Did anyone else also got the notification of this video few days ago? Or is it just me
Edit thank you guys i have never got so many likes thank you
Like 2 days ago?
yea i got it too and i left it in a tab for a while but when i got back to it the video was unavailable. probably some last minute editing.
@@alveolate yeah think so
She said it in Twitter. It has some mistakes in last upload
It was taken down and reuploaded as it contained errors
Isn't that what caused the "static" on old TV's?
When I heard that, I thought that was awesome!
Only 1% of it :)
That fact that there is an absolute way to measure velocity makes me very happy and I don’t know why.
It is not a way to measure an absolute velocity. It is a velocity relative to the CMB.
I heard somewhere that the CMB can be used to estimate the size of the entire universe. Not just the visible universe. How is it then that we can see the CMB everywhere, but we know there are galaxies that we will never be able to see?
The cmb can't be used to estimate the size of the entire universe, the best it can do is estimate the curvature of our observable universe which might indicate the size of the universe, but not really since we can't actually see what's behind the observable universe to confirm this.
@1:24 Drops THX sound to induce chills from CMB. :) that was cool.
4:14 - wait. Dry shampoo? I’m sorry, I realize that the origin of our existence is pretty important, but I really need to know more about this dry shampoo you speak of.
Its soap dry shampoo is soap
@@karanbirsinghbhullar No it really isn't. It's corn starch and a number of other things in an aerosol can. Designed to be sprayed on hair where it attaches to the oiliness, then can be brushed out.
You can use flour like my granma did. Both need complete brushing out though.
@@bmerigan Good explanation.
@@johnchandler1687 wouldn't it just be easier to wash it?
Wait, is it a re-upload?
That was my reaction, I don't know what's going on...
I think so
The last video, from December, talks about a similar topic... Dark Matter and she touches a bit on Cosmic Background Radiation... not a re-upload.
Well, I don't mind watching this once again. Because why not!
@@vansantosdaddy here:
„Physics Girl uploaded: This thing is -270°C and is EVERYWHERE
4 days ago”
So…
Wasn’t this video uploaded about a week ago or 4 days ago. Love your videos
I love how she explains the complicated words it’s very helpful lol
Fun fact - the "temperature" of the background (2.7 K) corresponds to a light frequency of 56 GHz. That's actually *more* energetic than a typical household microwave oven (which operates around 2.45 GHz, the same as a lot of wifi devices). If you could concentrate the CMB with a giant microwave magnifying lens, you could actually heat up food (or pop popcorn) with it!
(e\ the 2.45 GHz of your wifi or microwave has an equivalent temperature, via the Boltzmann constant, of only 0.12 K)
Get better, Diana!❤❤❤
ohhhhhhhh, it's physics-girl! all this time, i thought it was like, "physics, girl, don't even get me started!"
get out
“I get chills when I talk about it.”
Meanwhile, me sitting with a poker face 😑 unmoved.
My dark soul smiles
I'll take things that didnt happen for 400
Waited for this for days
Excellent explanation of this very complex subject!
Another way to think about the cooling of the CMB is that the expansion of space stretches the light, increasing its wavelength, decreasing its frequency, and decreasing its temperature. Very cool! (Cool? - no, super-cold!)
The age of the universe is determined using two different methods:
1- By studying the oldest objects within the universe .
And 2- By measuring how fast it is expanding.
But can't we just measure what we can see, or rather what our instruments reach? What if there's more Universe beyond the, well, Universe and we simply can't see it and therefore measure because the light is too far and expanding too fast to reach us?
Just remember you’re never alone...
"it's EVERYWHERE".. How do we know? Have we actually looked everywhere? I thought that the universe is pretty big and we only discovered a small portion of our solar system..
Another thing I don't understand is this: if the source of CMBR is the light that "got out" shortly after the big bang, and we can detect it continuously, not just as a pulse, then it means that something is still producing that light, right?
We can see into galaxies millions of lightyears away, is that far enough.
Remember this information is just a guess based on inaccurate knowledge. No one knows for sure and they talk like they have all the answers. People are so gullible and listen to this whole heartedly as truth!!!!
Do we know that every part of every lake and river and ocean is wet? Because I am pretty sure we have not looked everywhere.
8:28 Yin-Yang
8:27 what exactly do you mean with blue and red shifted here? is it different speeds?
Red going away from us. Blue shifted coming towards us.
As the universe is expanding, the peaks and dips of the wave are going farther apart, causing the red shift. The shift is due to the expansion of the universe.
Wow ! Brilliant video. Keep 'em coming ! I'm subscribing.
Huh. Deja vu. I swear I've watched this already. Did you reupload this, Dianna?
The last video, from December, talks about a similar topic... Dark Matter and she touches a bit on Cosmic Background Radiation... not a re-upload.
@@vansantosdaddy Cheers, mate.
@@vansantosdaddy well... No... I definetly watched this last week. Probably took it down to do some last minute changes
@@fredriks9070 Sorry... you are correct. I wasn't notified... gotta love TH-cam.
"Hey Physilers!" - I love that. :D
"This thing is - 270 degrees C and everywhere." Ooh, ooh, I love Jeopardy! I got this one: What is the cosmic microwave background?
Did I solve Behind the Stars 500?
Energy does not simmer down, it flows like a frequency being turned up in volume, and down, upward spiral, downward spiral, positive energy, negative energy, constantly transferring
Beautifully put, thanks.
As a woman, you have no idea how happy it makes me to have found your channel. All the other channels are men's. My comment will get lost among the others probably, but if you ever get to see it, thank you thank you thank you !
I Loved watching the CMB show on TV at my Grandparent's House.
Her cuteness has lured me into learning a thing
the CMB is not everywhere in the universe at all times, but omnidirectional. that is a big difference, as you can shield yourself from it like from any other kind of radiation. make a cube out of metal walls --> no cmb inside the cube.
now dark energy on the other hand ...
Haven't watched the other video on it which you suggested, but compressed canisters like that don't really get cold because of compressed gas expansion so much as the state change of the propellant (usually propane, butane, or a mix of the two) boiling from liquid to gas.
Which I guess is also expansion, rather different from what you were talking about when you made the analogy.
It's refreshing to see a girl more excited about physics than makeup on utube...Ur enthusiasm is what keeps me hooked...it really shows that you're so passionate about what you do💝
I have the feeling i have already seen this
Maybe they re-upload the video
It's a re-upload from a few days ago
The last video, from December, talks about a similar topic... Dark Matter and she touches a bit on Cosmic Background Radiation... not a re-upload.
@@vansantosdaddy it was uploaded 4 days ago, check your notification inbox.
@@japorah Gotta love TH-cam. Thanks.
Wait what if our entire universe is just a deodorant spray from some alien teen.
Good stuff😂
Reminds me of Horton hears a who. I seriously have pondered upon a similar scenario. Our universe is bewildering indeed. Also this cosmic dust signal (cmbr) makes me think of Star Wars and the concept of chi (which I think George Lucas might have been inspired by).
Hello physics girl I am impressed by your ability to describe such different topics in physics. Many of your videos I have watched and my knowledge has been pieced together into a good overall picture.
Now I have some curious questions that I hope you want to answer about this video.
1.It seems strange to me that the temperature "only" goes down to minus 270 degrees but in stars the temperature can be millions plus degrees. I have read somewhere that the electrons can no longer jump between different shells in the atom and therefore the reaction stops, or are there other reasons. But metals become superconducting so the magnetic force cannot disappear and thus neither can the electric field force?
2. Does any change in gravity occur or does it have the same impact in minus 270 degrees, or does it become dark energy that controls?
3. From what I understand, no more matter can be created in the universe but what comes into being in the big bang, elemental particles are reshaped/merged into stars.
But surely when the universe expands, "voids" should be created between matter, and surely this void should consist of "something"?
Is it the "time" that has elapsed that is the void, but is it this "time" that we cannot yet measure as matter?
Many Greetings from Sweden
Excellent video - thanks! 😊👍
The coldest place in the Universe is my ex's heart!
An Ex with a heart - What a concept LOL
I just had a amazing thought. The big bang is what we can still hear from when God spoke the universe into creation!!!
We exist in the echo of everything for eternity.
Profound thought.
No
8:30 Relative to what exactly? I mean... The Big Bang happened everywhere right?
Basically: relative to the path the Earth would follow if it were to perfectly flow with the universe's expansion.
The Earth orbits the Sun, and the Sun orbits the Milky Way, and the Milky Way is attracted to nearby galaxies (like Andromeda). This movement is evidently different from what the Earth would do without those other factors. In that case, it would perfectly flow with the universe's expansion.
Imagine your surrounded in a circle by those tennis ball dispensers. They are all constantly shooting their tennis balls to the center at the same velocity. If your standing still w.r.t. the tennis ball dispensers, then every tennis ball from any direction would hit you just as hard. But if you started moving in some direction, the tennis balls in that direction would hit harder compared to those from the opposite direction. The tennis balls are the light from the CMB and the tennis ball dispensers are the stuff where that light originated from. You are the Earth in the middle. That's how we measure our speed relative to the CMB.
Of course in this analogy there is no explicit 'expansion of the universe' but I hope you get the picture.
@@Missle636 Wow! That is a really nice explanation, making total sense! Thank you.
Joyexer
Before the Big Bang, there was no everywhere. Or was it? 🤔
No...it happened at a ''pinpoint''.....go figure.......GTFOH !!!!!!!!!!
I've always wondered why everyone talks about CMB as the beginning of the universe (implying the red-shifting has only so far stretched to microwave levels) but _nobody_ went ahead to test for lower wavelength backgrounds. After all, light that already existed in the microwave band at the beginning couldn't have remained microwave after all this time, correct? Sure they would've red-shifted to longer radio wavelengths by now.
You don't actually need sophisticated equipment to detect those signals. All you need is an old TV set and an old aerial antenna then tune in on an unoccupied channel, (i.e. the channel that has no television broadcast) and you will get the cosmic radio noise that the scientists and astronomers are getting.
Wow! The order and beauty of the universe makes me want to worship its creator even more❤️
LOL...'creator'
Yeah ahhh. NOPE
Phizzlers!
boys i'm feeling deja vu!!!!
Ya dude, think I too had the same deja vu
The last video, from December, talks about a similar topic... Dark Matter and she touches a bit on Cosmic Background Radiation... not a re-upload.
@@vansantosdaddy This is a reupload!. Read her comment⬇
4:37 Fun fact but still nice to know: actually Hydrogen, Helium and some noble gases are the only exception to that since they are the only gases that get hotter while expanding. Thats also the reason why Hydrogen is able to selfignite when leaking out of a gas bottle or a supplyline. So next time you're working with Hydrogen you better check for leaks! ;)
So if you turned off the CMB what would the temperature of our section of space be? Has the heat and light that originally bathed our region of space now completely gone?
Is it anything thing to do with the overwhelming sense of deja vu I'm feeling.
I swear I saw this title recently :)
Who loves physics like here
❤️
The initial discovery of the CMB is one of the most real life examples of "not seeing the forest for the trees". These researchers being stumped by weird, pretty uniform waves being everywhere instead of the specific waves they wanted to look for, only to realize that their instrument is correct: we're just so totally surrounded by these microwaves.
8:26 blew away my mind. What? Is the cosmic microwave background redshifted in one direction and blueshifted in the opposite direction? Does that mean that if your making a spaceship that reaches a situation at which the CMB is not redshifted and blueshifted in any direction it is at rest according to the universe. When away form any massive body. The time meassured at that moment is the basetime of the universe and the ditances measured them are the base distances. Or am I wrong? Why?
40 seconds in, clickbait for backgroud radiation?
You should have picked it from the title alone.
"Old timey television" oof
I used to like the white noise before programs started in the morning. Kids these days will never know
@@williamchamberlain2263 - It's still just noise, just not the blank CRT noise!
I’ve never heard anyone pronounce homogeneous like that and not be joking.
"Physics girl" isn't exactly a geneous
hoe-moe-geen-ee-us
and
huh-mah-junus
are both correct pronunciations.
Big fan of the channel. All episodes are good, this one especially good.
if you use microwaves to hear food up, why can you not some other wave to freeze or at least fast cold. always wondered about this. instant ice cream instead of waiting hours for the same product.
"Phyzzlers" Hahaha
no.
I think that joke phyzzled out.
one of my old trucks was a source of am radio signal. It was weak but I could hear the engine running thorough the walkman I had at the time.
8:28 i like how cobe/nasa picture of cmb is identical to yin yang symbol, it even has 2 dots in the middle :)
I am, sadly, one of Sheldon Cooper"s "Dirt Diggers" and have been so for almost 40 years (B.S. Earth Sciences, Penn State 1981 and Georgia Tech, M.S. Seismology, 1991). Thus, I note that I am very grateful for your funny, but very educational video shorts. Thank you and best wishes!
Very interesting. You are one most of the most passionate ladies in the universe.