What is Light? Maxwell and the Electromagnetic Spectrum

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  • เผยแพร่เมื่อ 3 ม.ค. 2025

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  • @mohammadbhuiyan6034
    @mohammadbhuiyan6034 3 ปีที่แล้ว +1157

    “Light travels faster than sound. This is why some people appear bright until you hear them speak.”

    • @novaastronomia8720
      @novaastronomia8720 3 ปีที่แล้ว +16

      No, it such mere deceptions can't be measured by naked eyes.

    • @jahazielvictoriano8663
      @jahazielvictoriano8663 3 ปีที่แล้ว +4

      XD

    • @anushkam.4621
      @anushkam.4621 3 ปีที่แล้ว +3

      Oh my God🤣🤣

    • @thewalkingbringerofdeath3015
      @thewalkingbringerofdeath3015 3 ปีที่แล้ว +5

      Wise words.

    • @mojopin70
      @mojopin70 3 ปีที่แล้ว +3

      Except there is a lot more going on that we can't see than people realise. I don't need to hear someone speak to know if they are ' enlightened ' or not ;)

  • @TheRoyJames
    @TheRoyJames 6 ปีที่แล้ว +677

    I lowkey was waiting for him to say, OK, let me shed some light on this subject

    • @dabmaster1233
      @dabmaster1233 4 ปีที่แล้ว +3

      Science Revolution what the fuuuuuu

    • @stayhumble.5686
      @stayhumble.5686 4 ปีที่แล้ว +1

      @Science Revolution Dude thats an amazing explanation thank you

    • @cubemage3336
      @cubemage3336 4 ปีที่แล้ว +1

      wasted opportunity xD

    • @acrohasatablespoon1408
      @acrohasatablespoon1408 3 ปีที่แล้ว

      @Science Revolution we call this "dumb assery"

    • @malcolm4050
      @malcolm4050 3 ปีที่แล้ว +2

      I’ll never know what science revolution said. My life will never be complete

  • @AliThamir
    @AliThamir 4 ปีที่แล้ว +70

    explained in 4 mins what my lecturer failed to explain in 40 mins

    • @Relateable__
      @Relateable__ 12 วันที่ผ่านมา

      Bro shut up with these comments 😊

  • @adityarane6775
    @adityarane6775 6 ปีที่แล้ว +88

    I have no words for the way u are presenting the topic for us. Pls keep making such videos with animations and images. Also try to make some videos related to the IIT-JEE prep, I would love it.

  • @llamamefon
    @llamamefon ปีที่แล้ว +3

    Omg I came here for my psycholinguistics homework two videos ago and I just can't stop watching you! I loved so much the review at the end. What a great teacher! This BA Mexican student is sooo happy!

  • @amiracle6939
    @amiracle6939 3 ปีที่แล้ว +3

    u have ur own aesthetic of a science teacher thats actually cool

  • @nickathans78
    @nickathans78 4 ปีที่แล้ว +40

    I’m very disappointed, there was so much room for a light 💡 dad joke somewhere in there haha.
    Awesome vid again, Thanks Prof Dave! Science is addictive, or my ocd has nothing else to focus. Either way I’m enjoying learning, bit by bit.
    They way it’s all sectioned out makes your page extremely easy to reference.
    Explain it to me like I’m 4yrs old and we are all good. Love it haha 😂

  • @ytcommentsguy
    @ytcommentsguy 3 ปีที่แล้ว +6

    Bad news travel faster than than the speed of light.

  • @isenfirecat
    @isenfirecat ปีที่แล้ว +4

    All my life I've only ever been on the Autism Spectrum, so this is a very helpful video, thanks

  • @danpower7416
    @danpower7416 5 ปีที่แล้ว +14

    What is Light? Baby don't hurt me, don't hurt me, no more.

  • @y5mgisi
    @y5mgisi 10 หลายเดือนก่อน +23

    Reality is so weird.

  • @kayleewinters8721
    @kayleewinters8721 7 ปีที่แล้ว +51

    That was the best intro ever

  • @369Omniverse
    @369Omniverse 4 ปีที่แล้ว +5

    (I) Electromagnetic waves
    (ii) Electric field & Magnetic fields
    (iii)3*10^8 m/s

  • @jeromejeremytay6721
    @jeromejeremytay6721 6 ปีที่แล้ว +5

    At 2:38, I believe the formula should be c=λf

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 ปีที่แล้ว +4

      same thing

    • @carultch
      @carultch 3 ปีที่แล้ว

      @@ProfessorDaveExplains Is there a historical reason for nu instead of f to represent frequency of light, when lowercase f would seem more logical? The letter nu seems like it has no connection to the word frequency.

  • @stvrlighttz_.
    @stvrlighttz_. 7 หลายเดือนก่อน +9

    In chemistry/physics jesus we trust 🤞

    • @wiltedsaint
      @wiltedsaint 3 หลายเดือนก่อน

      this is so funny 😭

  • @chloenicole7528
    @chloenicole7528 4 ปีที่แล้ว +22

    Not gonna lie when my teacher for general science all I could think of was how much Dave looks like *jEsUs*

    • @chrisdias7842
      @chrisdias7842 3 ปีที่แล้ว +2

      Not at all

    • @chrisdias7842
      @chrisdias7842 3 ปีที่แล้ว +2

      At least I do not think so

    • @bisola383
      @bisola383 3 ปีที่แล้ว

      Y’all Jesus was black or at least I think so. The bible didn’t mention his color

  • @fatunicorn98
    @fatunicorn98 4 ปีที่แล้ว +2

    This is the best explanation that I have seen or heard. Electro magnetic is good but energy frequency will also cover sound.
    What is light?
    Light to us is an electromagnetic energy frequency that most living beings translate into what we perceive as light. All other energy frequencies are darkness to us.
    If Earth has the only living beings in the Universe and our Sun went supernova extinguishing all life, would the universe be light or dark?

    • @dabmaster1233
      @dabmaster1233 4 ปีที่แล้ว

      Fat Unicorn other stars dumbass

    • @fatunicorn98
      @fatunicorn98 4 ปีที่แล้ว

      @@dabmaster1233 it's not about the star, it's about living beings that can translate an energy frequency into what we know as light. The universe would be dark.
      Dumbass!

  • @joyjoy323
    @joyjoy323 6 ปีที่แล้ว +8

    Best explanation 👍

  • @jahiravasquez7602
    @jahiravasquez7602 5 ปีที่แล้ว +9

    I wish professor Dave would cite his sources in his youtube vids :,( i always use his vids to write essays for my science classes

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 ปีที่แล้ว +10

      i usually just work directly out of a textbook! and i find them all the be rather similar

    • @jahiravasquez7602
      @jahiravasquez7602 5 ปีที่แล้ว

      Professor Dave Explains omg he replied 🤩 lol ok so I’ll cite any textbook I use. your vids are just so I can understand what’s being said in the textbook. Got it. Thank you!!!

  • @StructuralEngineer-e3m
    @StructuralEngineer-e3m 3 หลายเดือนก่อน

    You are the best TH-camr and science educator, well all fields, educator.

    • @MatthewPhilip-d6z
      @MatthewPhilip-d6z 17 วันที่ผ่านมา

      Is it correct though, that all EM radiation is light? Are gamma rays light? Are radio waves light?

  • @phatgar9461
    @phatgar9461 5 ปีที่แล้ว +4

    Hi this is a very awesome video. Can we use it for our thesis project?

  • @realizeislam4820
    @realizeislam4820 3 ปีที่แล้ว +1

    1:11
    *I am confused that why people represent the wave like the above one instead of the below one which is real ?*

  • @PoppyPresents
    @PoppyPresents 7 ปีที่แล้ว +5

    I find your videos really good to watch

  • @MehrTV.
    @MehrTV. ปีที่แล้ว

    What is the nature of the electromagnetic field?

  • @lisztplayer2203
    @lisztplayer2203 3 ปีที่แล้ว +10

    Hi Dave. I love your videos...very informative. Question - I read that a photon has no mass. Does that pertain only to a 'resting' photon, and they gain mass only when moving (which they essentially always do or we wouldn't see anything)? If a photon has no mass, and gravity affects objects with mass, how does a black hole attract photons so strongly they can't escape? wouldn't they be unaffected if they are massless? It may be a stupid q, but I'm no physicist so figured you might could help me out with this one...thanks!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  3 ปีที่แล้ว +13

      Always massless, so with black holes it's about the warping of spacetime, check out my modern physics playlist for more info! The general relativity tutorial in particular. And then also my astronomy playlist for more on black holes.

    • @lisztplayer2203
      @lisztplayer2203 3 ปีที่แล้ว +4

      @@ProfessorDaveExplains Right, I get the warping of spacetime (well mostly) but I figured that is what's happening in a gravitational field anywhere...meaning that I thought the key component to gravity (warping of spacetime) manipulating anything was that whatever that thing is it has to have mass. I've always thought of matter according to its traditional scientific definition: anything that has mass and takes up space. Gravity (warping of spacetime) attracts matter b/c matter has mass. A photon has no mass and essentially doesn't take up space, it isn't really 'matter' by definition, or is it?
      To me it suggests that gravity is simply one component / 'side effect' of the warping of spacetime, meaning the warping of spacetime and gravity are NOT exactly the same thing. i.e. there is more to the warping of spacetime than it just creating a gravitational field - it's does more than that I'll check out the videos you mentioned. I think I saw one or two on black holes already.

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  3 ปีที่แล้ว +8

      The black hole is the thing doing the warping, black holes have mass.

    • @lisztplayer2203
      @lisztplayer2203 3 ปีที่แล้ว +5

      @@ProfessorDaveExplains Understood, my confusion lies in that even though the black hole has mass, doesn't anything it attracts have to have mass also? Or is it not required for BOTH objects to have mass?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  3 ปีที่แล้ว +11

      it's just that the black hole warps spacetime so immensely that the escape velocity exceeds the speed of light, it's all in the astronomy playlist

  • @anuragchavan7900
    @anuragchavan7900 6 ปีที่แล้ว +7

    Sir can you make a video on
    Emission adsorption spectra

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 ปีที่แล้ว +2

      i cover that a bit in the bohr model, i talk about it a bit in the astronomy series with the spectral classification of stars

  • @samk6042
    @samk6042 5 ปีที่แล้ว +62

    My physics teacher showed us this 😂😂

    • @cheddis3249
      @cheddis3249 4 ปีที่แล้ว +1

      Jean-Paul Teitu II, how stupid are you?That comment was from a year ago.

    • @leekfam7667
      @leekfam7667 4 ปีที่แล้ว

      Jean-Paul Teitu II where is your proof of this? You most likely have never met his mother nor has this person met you, so neither of you can objectively call the other stupid with no basis

    • @cheddis3249
      @cheddis3249 4 ปีที่แล้ว

      Okay. I will rephrase it then. How could not see that this was posted a long time before the quarantine, it’s right at the top. My point is how quickly do you read over things that you don’t even pay attention to the big parts. And don’t even try to insult my mom.

    • @primo3621
      @primo3621 4 ปีที่แล้ว

      @Jean-Paul Teitu II wow I have never seen such rare specimen of ape-human hybrid tell me good sir do you have a brain?

    • @leekfam7667
      @leekfam7667 4 ปีที่แล้ว

      Jean-Paul Teitu II you fucking edited it don’t even give me that shit

  • @JamesCampbellPPG
    @JamesCampbellPPG 6 ปีที่แล้ว +5

    Good stuff man. I love the quick mask cutouts!

  • @sasha29622
    @sasha29622 7 ปีที่แล้ว +16

    Way to go Dave! Started watching your videos even when not studying! And damn you hit me with a quiz at the end (really good idea actually!). Will support you $ when out of grad school (lol)! Can't wait for next one!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 ปีที่แล้ว +16

      future money is almost as good as now money! and leisure watching is good too :)

  • @sanjuansteve
    @sanjuansteve 4 ปีที่แล้ว +2

    Are all wavelengths in the electromagnetic spectrum polarizable as with visible light? Thx

    • @carultch
      @carultch 3 ปีที่แล้ว +1

      Yes, we can find polarized EM radiation of all kinds, either manmade or natural. Since EM waves are transverse, all of them have a polarization. And a group of them could either have an organized polarization, or a mass assortment of polarization that we'd call unpolarized.
      Some examples:
      UV is naturally polarized as it fills our blue sky background.
      AM radio is linearly polarized vertically by the working principles of the antenna orientation, while FM radio is intentionally polarized with a circular polarization to improve reception on any receiver's antenna orientation.

  • @YashKumar-mypage
    @YashKumar-mypage 3 ปีที่แล้ว +1

    Good Explanation

  • @georgecooper1753
    @georgecooper1753 3 ปีที่แล้ว +2

    wtf is that intro lol its AMAZING

  • @sajalaly9534
    @sajalaly9534 3 ปีที่แล้ว +1

    Please provide me the link of how electromagnetic feild is produced

  • @greenholic890
    @greenholic890 3 หลายเดือนก่อน

    I prefer listening to this than our 3 hour lecture lol

  • @cOr3t3ecks
    @cOr3t3ecks 5 ปีที่แล้ว +1

    Do we know absolutely that there is no more to the spectrum, or have we just not discovered any new way to record what may be beyond? Stupid question. I know but how can we test it or find a way to test it? Good use of Horus BTW.

  • @theophthalmologist9331
    @theophthalmologist9331 2 ปีที่แล้ว +2

    If different wavelengths means different colours, than why colour do not change with refraction where the wavelengths change and become shorter? Thanks in advance

    • @hereIam1965
      @hereIam1965 4 หลายเดือนก่อน

      Harmonics . Ratio . ?

  • @Neba1826
    @Neba1826 2 หลายเดือนก่อน

    Your explaination is owsem🎉🎉 keep it up

  • @neurobits
    @neurobits 4 ปีที่แล้ว +1

    Hi, I’m very confused. Why some say “light particle doesn’t has neutral charge”, when is supposed to be the same exact thing. If I compare transmittion of electric waves over copper vs light over (well, inside) optic fiber, I can catch that maybe because of wavelenght another conductor is needed. But there are other reactions that are different, looks like light can’t give you a shock, but electricity certainly can. Thnx in advance!

  • @nafisaparveen4275
    @nafisaparveen4275 4 ปีที่แล้ว

    2:18
    Why does all elctromagnetic radiation have the same speed,I mean they should have different speeds because they have differemt frequencues.
    "A wave having more frequency travells slower than that of a low frequency wave". Pls explain this🙏🙏🙏🙏

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  4 ปีที่แล้ว +1

      frequency is about number of wave cycles per unit time, all EM radiation still travels at the speed of light

  • @youssofmasri7572
    @youssofmasri7572 8 หลายเดือนก่อน

    There's a typo at 2:38
    should be C = λ.f

  • @Johnytiger
    @Johnytiger 2 ปีที่แล้ว

    here studying the electromagnetic spectrum looking for a connection to consciousness and and all this is connected to the phenomenon

  • @GirmaTesfaye-b6m
    @GirmaTesfaye-b6m 4 หลายเดือนก่อน

    Good presentation

  • @jamaaljama7270
    @jamaaljama7270 4 ปีที่แล้ว +1

    This is exactly what i was looking for

  • @rkreike
    @rkreike 6 ปีที่แล้ว

    Q: Lightspeed is constant in water and in glass and in vacuum, so why not also in Earth’s atmosphere?
    And: As lightspeed in Earth atmosphere is constant also when the lightsource is changing velocity,
    that should be different for observers when changing velocity?
    Or not?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 ปีที่แล้ว +2

      the speed of light is always constant, it just can take light more or less time to travel through different substances because it has to interact with the atoms it contains in order to do so, and that can change the path of the light, so i believe the density of the substance is a factor.

  • @troyingram716
    @troyingram716 ปีที่แล้ว

    And so, wavelength determines color while amplitude determines chroma? Extreme Amplitude is bounded between black and white, All color to no color? Or is it, max visible amplitude results in highest color intensity and the energy level either goes to white light ( high energy) or no light ( low energy).

  • @paulasmathlessons1494
    @paulasmathlessons1494 5 ปีที่แล้ว +3

    Thank you sir this helped a lot.

  • @raybin6873
    @raybin6873 4 ปีที่แล้ว +2

    Watching this enlightened me..😁

  • @sherin7677
    @sherin7677 7 หลายเดือนก่อน

    Does EM waves present everywhere as full range with all types of waves? If an object absorb some visible light what does it mean? Does it mean that visible spectrum only incident the object and some Wavelengths are absorbed and some reflected?Or EM wave with full range hit that object first , and object absorbs only visible light ?

  • @thingintresting5495
    @thingintresting5495 ปีที่แล้ว +1

    I like the question part in the ending

    • @Neba1826
      @Neba1826 2 หลายเดือนก่อน

      Me too

  • @Trooman20
    @Trooman20 2 ปีที่แล้ว +1

    Can you explain how the wave nature of light causes refraction of light?

  • @yourfavouritescepticx8969
    @yourfavouritescepticx8969 5 ปีที่แล้ว +3

    Very informative vids. Keep it up buddy lol👍🏾

  • @PiyaChoudhari
    @PiyaChoudhari ปีที่แล้ว

    This is so good ! Light or electric magnetic wave is a wave of oscillating electric and magnetic fields perpendicular to each other and the dire tion of their propogation... Wow that animation was awesome 💯 explained everything

  • @vision8899
    @vision8899 2 ปีที่แล้ว

    1:18 “What is a kind, Kent?”

  • @jillcritchfield1031
    @jillcritchfield1031 3 ปีที่แล้ว

    That is the greatest theme song ever. Billy nye just got schooled on theme songs

  • @kemolegend907
    @kemolegend907 7 ปีที่แล้ว +1

    Do a playlist on Inorganic chemistry

  • @mathisawesome618
    @mathisawesome618 4 ปีที่แล้ว

    What I still don't understand: How much must be reflected by every object, so that everyone, even people standing really far away can see it? I mean the particles that are reflected must go into every direction and fill the whole space around them to make that possible right? that seems like a crazy amount of waves being emitted by every object and how do these waves not mix with all the other waves/particles that are reflected by all the objects around them?

    • @marksimpson2321
      @marksimpson2321 2 ปีที่แล้ว

      I'm sure a lot of the waves do interfere and get absorbed but there are trillions and trillions of them everywhere.

    • @generalgrievous2202
      @generalgrievous2202 2 ปีที่แล้ว

      @@marksimpson2321 they do, thats why light pollution is a thing

  • @d4567889
    @d4567889 6 ปีที่แล้ว +1

    If light is a electromagnet wave then can we produce current if we keep a Cooper coil under the sunlights ?

  • @ts37924
    @ts37924 ปีที่แล้ว

    THANKS! this was to the point and very comprehendable.
    one doubt though, why is is that electromagnetic radiations are not deflected by electrical and magetic feilds ?

    • @MatthewPhilip-d6z
      @MatthewPhilip-d6z 17 วันที่ผ่านมา

      Is it correct though? Is all EM radiation light?

    • @ts37924
      @ts37924 16 วันที่ผ่านมา

      @@MatthewPhilip-d6z i guess yeah it is

    • @MatthewPhilip-d6z
      @MatthewPhilip-d6z 16 วันที่ผ่านมา

      @ts37924Thanks. But what about these definitions of light;
      The Oxford Dictionary of Physics;
      “The form of EM radiation to which the human eye is sensitive and on which our visual awareness of the universe and its contents relies (see colour).”
      Brittanica;
      “Light is electromagnetic radiation that can be detected by the human eye.”
      Nasa;
      “When we talk about light, we usually mean any radiation that we can see.”

  • @JoshVandever
    @JoshVandever 2 หลายเดือนก่อน

    There probably isn't an upper limit on the EM spectrum, and more intensely energetic waves are probably possible, they would probably have to be created artificially.

  • @mayofastora1615
    @mayofastora1615 3 ปีที่แล้ว +2

    My teacher linked this vid ;-;
    We have to do a poster about 1 of the 7 electromagnetic waves, I choose ultraviolet.

  • @rohitraizada9520
    @rohitraizada9520 3 ปีที่แล้ว

    Wasn't the speed of light in a vaccum was 300,000 m/s? If the speed was 300,000,000 m/s it would only take 30 milliseconds for the sunlight to reach Earth, but as a widely believed fact, it takes 8 minutes and 17 seconds to happen that. Also, as you stated that it takes around a second for light/any electromagnetic wave to travel to the moon, and by considering that moon is around 380,000 meters from earth, it again works out to around 300,000 m/s.

  • @wastman9762
    @wastman9762 4 หลายเดือนก่อน

    This classification of EM waves is based on wavelength and frequency in vaccum or air. Right? As wavelength and so do speed changes in other mediums. And whether all em waves have same speed in certain medium such as glass or water or they vary?

  • @vanshsharma6809
    @vanshsharma6809 6 ปีที่แล้ว +20

    I always feel free to email you but you are never free to respond me.

  • @JonathanJollimore-w9v
    @JonathanJollimore-w9v ปีที่แล้ว

    What if matter is just more of the electromagnetic spectrum but after protons have gained more mass by attracting an electron but still part of that spectrum?

  • @tatiannalarsen776
    @tatiannalarsen776 6 ปีที่แล้ว +1

    I am taking a college level physics, I was told double transverse waves travel through a vacuum at 186,282 miles/s

    • @ahmadramadan8271
      @ahmadramadan8271 4 ปีที่แล้ว

      ya but in the video he said kilo meters

  • @playerraja2483
    @playerraja2483 3 ปีที่แล้ว

    0:08 subbed.

  • @salahrazasaeed5990
    @salahrazasaeed5990 4 ปีที่แล้ว +1

    very nice

  • @evoguy1344
    @evoguy1344 3 ปีที่แล้ว

    Very nice video, helped a lot

  • @monikagoyal7227
    @monikagoyal7227 4 ปีที่แล้ว +2

    Where is light actually in this spectrum?

    • @colorspace5541
      @colorspace5541 3 ปีที่แล้ว

      "visible"

    • @monikagoyal7227
      @monikagoyal7227 3 ปีที่แล้ว

      @@colorspace5541 what

    • @carultch
      @carultch 3 ปีที่แล้ว

      @@monikagoyal7227 Visible light is the electromagnetic spectrum that is visible to human eyes.

  • @ValidatingUsername
    @ValidatingUsername 6 หลายเดือนก่อน

    I’m not sure if my comment is still here but what’s your take on the deconstructive interference at a photo detector that makes it look like there is no energy at that spot in time but the next plank length forward or back the two photons would have been observed 🧐 dark matter and energy?

  • @mansoorianthehouseofwisdom1007
    @mansoorianthehouseofwisdom1007 4 ปีที่แล้ว

    Nice explanation sir.... Wow amazing 👌❤️❤️💞👌

  • @danadavison1290
    @danadavison1290 4 ปีที่แล้ว

    The intro made me subscribe

  • @lizardmilk5753
    @lizardmilk5753 3 ปีที่แล้ว

    So I was at class writing about how chameleons change their color and now I'm spending recess learning about electromagnetic radiation

  • @itsmeranja4939
    @itsmeranja4939 3 ปีที่แล้ว

    plz tell whether the wavelength are separated or in a line like first blue then......

  • @davbhoy10
    @davbhoy10 7 ปีที่แล้ว

    As light is the electromagnetic field radatiion can manipulating this help with light speed travel?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  7 ปีที่แล้ว +2

      it wouldn't seem so! check out my four-part series on special relativity, it would require infinite energy to accelerate anything with mass to the speed of light.

    • @davbhoy10
      @davbhoy10 7 ปีที่แล้ว

      Professor Dave Explains thanks very much, i will check it out love your shows keep up the good work

  • @tendaychart
    @tendaychart 11 หลายเดือนก่อน

    Does the full range of the EMS measure from a Planck frequency on the low end (zero?) to an upper Planck length frequency on the gamma end? I can not find an answer to this anywhere!

  • @robertlovesgothgirlz
    @robertlovesgothgirlz ปีที่แล้ว

    Love these videos. Thank you

  • @tanyayasmin6101
    @tanyayasmin6101 2 ปีที่แล้ว

    If the frequency is 1x10^11hertz then it belongs to infrated right?

  • @magicjoe4925
    @magicjoe4925 5 ปีที่แล้ว +3

    Dave fast reply Thanh you. I sent you a response on your quantization part one video. I believe the answer is within Planck constant E=h f .the relationship of capacitance requires permittivity and permeability in free space versus analogy of parallel plate capacitor with quanta units of energy. The math gives h in terms of charge, permittivity, permeability and capacitance. If you want to see the math I can send you a e mail

  • @sukhmansingh1132
    @sukhmansingh1132 2 ปีที่แล้ว

    NICE VIDEO

  • @magicjoe4925
    @magicjoe4925 5 ปีที่แล้ว

    Is there a mathematical connection between light and capacitance in any way??

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 ปีที่แล้ว +1

      yikes, i don't know enough about engineering to be able to answer that!

  • @horizonofmutiverse6223
    @horizonofmutiverse6223 4 ปีที่แล้ว

    What is the origin of EM spectrum?

  • @ashleyloren6159
    @ashleyloren6159 3 ปีที่แล้ว

    Thanks Professor Dave!

  • @strugglingcollegestudent
    @strugglingcollegestudent 2 ปีที่แล้ว

    I remember watching this forever ago for gen chem and now I'm taking ochem 2 I need to review it so I can figure out spectroscopy

  • @rajeshchandrasekharan3436
    @rajeshchandrasekharan3436 6 ปีที่แล้ว

    Sir, waves are disturbance moving in a medium,ie some energy is transferred through a medium.EM waves can travel through vacuum.Here no medium is distributed.why? please replay satisfactorily

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 ปีที่แล้ว +1

      not light! no medium required. it's just the fluctuation in an electric field that is propagated.

  • @haryanvibhajan189
    @haryanvibhajan189 4 ปีที่แล้ว

    Super amazing video

  • @redthered3242
    @redthered3242 4 ปีที่แล้ว

    goddamnit i instinctively clapped at myself like a kindergartener when i got the answers correct.

  • @kennclark5592
    @kennclark5592 2 ปีที่แล้ว

    Passing the speed of sound has a sonic boom. Is there any explosions or " booms" when the speed of light is passed? Or any predictions of this?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  2 ปีที่แล้ว +3

      Well it can't be surpassed, but no because light is not a reverberation within a medium.

    • @kennclark5592
      @kennclark5592 2 ปีที่แล้ว

      @@ProfessorDaveExplains ty always been curious about.

  • @rogersrivasan2150
    @rogersrivasan2150 2 ปีที่แล้ว

    David you are awesome!!!

  • @RixtronixLAB
    @RixtronixLAB 2 ปีที่แล้ว

    Nice video, thanks :)

  • @prathisivan8290
    @prathisivan8290 5 ปีที่แล้ว

    Wave front?

  • @diniiii009
    @diniiii009 5 ปีที่แล้ว

    What is different of wavelength of light in water and air?

    • @JohnRoot34231
      @JohnRoot34231 4 ปีที่แล้ว +1

      Wavelength decreases in water and speed slows down. Frequency is the same.

  • @Omsehnji
    @Omsehnji 2 ปีที่แล้ว

    just entered a red light therapy machine today. Which does have some therapeutic benefits according to scientific studies. The question I have is of the red light therapy machine that is located at my local gym. My question is that, does red light, do you actually see it in the color red or can it still be clear but just immiting at the specific frequency range of red. I ask this because when the machine was turned on I could see the bulbs turns red but as time when by the bulbs seem off white to me. I thought I would be basking in blood red light but apperently not. They gym actually give the kind of bulbs that they use and I didn't take down that information just but I will for further investigation. I mean for it to be therapeutic the light needs to be emiiting within a specific range and so I want to make I'm not wasting my time.

  • @brd8764
    @brd8764 2 ปีที่แล้ว +1

    symbol and unit write as m. #notes

    • @brd8764
      @brd8764 2 ปีที่แล้ว

      delicate symbol. #who

  • @chenpamei3423
    @chenpamei3423 6 ปีที่แล้ว

    I wonder who or which band sang that opening theme song

  • @sniperatharvakalele5403
    @sniperatharvakalele5403 5 ปีที่แล้ว

    question why isn't the b field a cos wave . Because if we see the slope of E field at points near the origin we have dE/dt maximum and Maxwell equation describes when change of electric flux is maximum magnetic field induced is maximum. I cannot find this answer if u have time plZ solve this querry.

  • @Richardbillig-zn3zc
    @Richardbillig-zn3zc 5 หลายเดือนก่อน

    Hi Dave Hydrogen gas bombardment in a Car piston is light and heat also air pressure. The lobestone turn it to electrical magnetic field the steel in the piston connect to lobestone shell turn it to electrical field Dave question can CarS not crash to each other if each Car are magnetic field.

  • @natureforestbeauty
    @natureforestbeauty 6 ปีที่แล้ว

    Explain particle nature of light

  • @tanvibadadare2622
    @tanvibadadare2622 3 ปีที่แล้ว

    thanks it helped a lot

  • @greenspringvalley
    @greenspringvalley 4 ปีที่แล้ว

    Why do some of them go through things but light stops at things?