How to Understand Gravity: The Road to Relativity (Part 1) - Ask a Spaceman!
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- เผยแพร่เมื่อ 2 เม.ย. 2018
- Full podcast episodes: www.askaspaceman.com
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How did Einstein develop General Relativity? What does it mean for space to be curved anyway? And just how do these gravitational waves work, anyhow? I answer these questions and more in today’s Ask a Spaceman!
Follow all the show updates at www.askaspaceman.com, and help support the show at / pmsutter !
Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Music by Jason Grady and Nick Bain. - วิทยาศาสตร์และเทคโนโลยี
These presentations by Paul are excellent to comprehend the evolution of relativity theory. I wish I could talk so eloquently. Well done and thank you!
I appreciate that comment, thanks!
love it. Good job. Taught chemistry, physics, astronomy, and evolutionary psychology for years. You are a great resource for my students.
Please get tuned into facts, 1. anti gravity is a product of the center field of a magnet. 2. the center of a magnet when vibrated will repel water 3. If you vibrate granite rock with the center field of a magnet at the correct frequency it will turn like butter. that's just the beginning it will play a Hugh part of our country's future. The anti gravity is only applicable to none iron type material such as glass or plastic. If you have a bar magnet simply tap the center near a trickle of water and watch the water move out of the way. Tap the center field on any none metalic surface and watch it loose weight. You can not use a sign wave type vibration it must be saw tooth . A sign wave signal contains the centerfield, that's what pushes AC and radio signals around the world. A sign wave has three elements on an oscilloscope you only see the two , On a scope you see the positive cycle and the negative cycle you never see the most significant part of the cycle and that is the center field that produces the energy to push the energy forward!!! There is allot to be learned about the magnetic center field .. Please help spred the news ..
Wow. I've been waiting for a series on gravity for a while now. I love the structure - cliff hanger and all. And, of course, the great information presented in such an understandable way. Can't wait for the next episode.
Thanks, I appreciate it! I think this is going to be the longest series I've ever done...
Please do this question: how gravity changes spacetime around the object, and how it interacts with high speed particle moving close to high gravity object? If we have three observers, one on the high speed particle and one on the high gravity body, and one in infinity in vacuum that for easy problem does not move in planet reference frame. How does time goes in these 3 reference frames?
Great video -- a real cliff hanger! Tune in tomorrow to see what Pauline's inertial mass being equivalent to her gravitational mass implies, or will Snidely Whiplash stomp her fingers beyond her ability to hang on, before Albert can understand why Snidely is just a question we don't even need to ask? Seriously, can't wait till tomorrow. I'm very thankful you are so patiently and cogently taking us step-by-step through how what became GR unfolded in Einstein's questing mind.
Ha! Great setup :)
Awww! Cliffhanger :D
I couldn't resist!
Strong eqquivalence principle, while asumed by Einstein in 1908, is a well established consequence of geometric nature of gravity (general relativity, which wasn't there in 1908). Breaking it requires additional asumptions. It is not true that 2m should fall twice as fast as towards an infinitely massive planet. F=m(inertial)a and F=Gm(gravitational)M/r2 means m(inertial)a=Gm(gravitational)M/r2 or a=GM/r2 (not dependent on mass of falling body) if m(inertial) = m(gravitational). 2m actually falls faster on Earth because Earth is falling faster towards 2m than m, but this is a tiny contribution if masses are not planetary sized.
Thank you for sharing your knowledge with us, mortals, Paul!
Ha, it's fun to share :)
Minute&seventeen secs? Steady there Paul, brilliant love it u got me hanging by a string on this! SolidApproval ;
Thank you so much for making these videos. I could watch you all day. I think about this stuff all.the.time! I would love to sit and just talk with you. But I bet you live in like California right? You are my absolute favorite person on How the Universe Works. You are great at making complicated things easier to understand, so thank you! Do you have children?
Maybe you should try making a bit longer videos? Not like isaac arthur, but at least 20 minutes or so. I find the topics you talk about very interesting, but sometimes they are too short i think. Like now there were several other topics you could have expanded on. And from what i noticed people who like these things usually prefer longer videos i think. Just a thought.
Unfortunately I don't have the production time to create longer videos...
That's ok, was just wondering if it was possible, since I really like your channel and was thinking on how it could get more views.
life is short, so do such video everyday 😋😜
I wish!
Goddamn Paul I LOVE these videos. Your ability to explain delicate matters is out of this world.
Really makes me wonder why your sub count is so low. Maybe you should change the channel name to something more catchy?
Ask a Spaceman?
Glad you like my videos! My channel houses a few different shows, so I'll stick to it for now :)
Interesting video to know about special relativity related with gravity, space , time etc.Theories of gravity by Sir Newton, Sir Einsten and Sir Galileo has made to understand special relativity better..Inertial mass and gravitational mass composed to acceleration to be identical , the fundamental assumption of the Universe.Thank you Sir for the Video.
Fresh from Isaac Arthur new video on O'Neil Cylinders, I decide to review parts 1 and 2 of this series before tackling part 3 of this great series on gravity. But before I go to part 2, you got me thinking (a dangerous thang) about a thought problem. In the far future, a cult decides to isolate themselves of all people, planets and stars. They launch a self-sufficient rotating habitat powered by vacuum energy into to an intergalactic void. Eons upon eons pass the expansion of the universe removes everything else in the universe across the cosmic event horizon. With no frame of reference, would that rotational motion and the centripetal force that maintains that one gee still exist after the Last Other Object leaves the observation universe?
Did you ever get an answer??
I'm falling behind. Time to binge watch and time to go to Patreon and donate. Thank you.
Thanks, I really appreciate it!
I was disabled for a couple years with diabetes and a bad back. I lost 60lbs and got a spinal fusion. I promised myself I would donate once I started making money again. So....
I watched a ton of Top Gear, Outback Trucker, and others using Netflix and Amazon Prime back then but then I found you (Dr. Sutter), Fraser Cain, Dr. Gay, and others. I found you first even though you've been doing the science communications the shortest amount of time.
Love it.
Thanks!
Very interesting, I will watch the other videos. You're very good, nice but calm... are you american?... salutations from Italy :)
I am, thanks!
Are there thousands of blackholes at the Center of the Milkyway galaxy? Is this true of other galaxies or is ours unique?
That's a pretty new result, and I'm not sure it will hold up to scrutiny.
I hope you explain gravity waves at some point doing this, because I still don't get how they work. In my head two orbiting bodies would warp space around their shared center of mass, so making a wave like a sound wave made of compressed and expanded space time just, doesn't fit.
My question about gravitational waves, is that why should it contract in one direction and expand in the other (and vice versa) why not just contract in one direction? Does space (occupied by the assumed element) have to stay equal?
One thing I can tell you is that gravitational waves are transverse waves like light, not longitudinal like sound.
Great question! It comes from symmetries in the math used to describe the waves.
A perfectly symmetric system cannot generate gravitational waves - you need some asymmetry to set them up.
End is the best :-)
I think it's the fist time I've ever done that...
How the hell was this uploaded 3 years ago? 2018 seems like 1 year ago
This isn’t about gravity or maybe it is.
What is the difference between the Unruth effect and Hawking radiation at the event horizon. As an observer watching something hovering at the event horizon.
Great question, it's on the list!
What if there was a god's ruler and god's clock (flat space, absolute time) but since we are made of matter, we couldn't see it? Also would the equations work under such assumption (saying that for example time is absolute, but speed of light is variable and length contraction happens) Would that work?
Your sarcastic answer is not helping.
That's the underlying assumptions of Newton's laws, which conflict with observations like the failure to measure differences in the speed of light.
Let me rephrase my question, between speed of light, length and time, we could assume two are variable, and one stays constant (like length be constant, but time and speed of light being variable) I guess the equations would still work out, but the observer would see speed of light being constant either way. Is that true? And how can we say which one is the real mechanism of the world? I know we chose the speed of light being constant, because apparently that's how we would see it, and I guess the model is simpler this way.
Thanks for your reply by the way.
so your saying in bel to now someing we no nothing ?
What is an instanton?
Great question, it's on the list!
So is that how all theoretical physicists do their work? by taking something that seems to be true and follow it to its conclusion and see if it works out? It sounds like basic scientific theory, ask a question, test, tell everybody so they can test it, rinse repeat. I would've thought it was more........systematic.
How else would you do it?
🪐☠️🪐
Gravity only exist inside an atmosphere