Thank You.Incredible how you can explain the most difficult concepts in the simplest of ways;mostly by analogy, and example.

You are good clear precise. Thank you, I am happy I found your video.

As this one is the first of the three videos, I'd like to say, on this video, thank you very much and congratulations on your very clear explanation ! The third video is just delightful! Again, thank you!

I tend to use low/high for frequency and short/large for wavelength, it’s less confusing (at least for me). High frequencies = shorter wavelength. Lower frequencies = larger wavelength. Great channel!

It's usual to omit the word "degrees" when using the Kelvin scale. So its -273 degrees centigrade but zero Kelvin. However, I personally don't think there is any serious issue with referring to degrees Kelvin.

My god, this was so interesting

Thank for your for your effort in making this so understandable!

you are a genius. It is not easy to make complex things easy to understand ...

great video thanks. I love that you say that the wavelength of the old radio 4 long wave, the voice of the BBC was about 1 mile, sounds suitably imperial

great explanation so far. subscribed.

I never realized until now that the Boltzmann constant is actually just the gas constant in Joules divided by Avogadro’s number. Neat-o!

I almost got up and clapped at the end of your three videos. Thank you so much.

You are great man, I appreciate what you do and your making the world a better place:)

Your voice is SOOO DIDACTIVE, you should keep on teaching physics. I will subscribe to every single video of yours.

Thanks man ur videos are much help for me

I am curious to know, which reference book you are following? you are so amazing while explaining the things. I know, only one book won't be enough for building such a great ability of teaching the difficult subject like physics.

Thanks, Dr. PhysicsA.

thank you, you have the best explanation on blackbody radiation that i,ve seen on youtube, but during the explanation of V= waveleght times frequency i think you missaid electromagnetic waves instead of mechanic waves

A wave does not have a point in time. A wave is a wave. It has a wavelength which is the distance between two consecutive peaks. If the entire wave is travelling with a velocity, say, to the right, then its frequency will be determined by the number of wave peaks which pass a particular point in one second

Just a thought. At time 3:10 , if 10 crests are counted to have passed a reference point, then shouldn"t only 9 units of wavelength be counted for that one second , I.e. 9 metres having gone past in 1 second ?

beautiful !!

Are the electric and magnetic fields each aligned with some physical dimension or are their values on some analytical axis perpendicular to all the physical dimensions?

You are awesome, thank you!

Are there any good advanced physics videos on KZfaq (like graduate level or even 4th year undergrad)? I've been looking for that level discussion on black body radiation to no avail. Thanks in advance.

Could you maybe make a channel for really, really beginners? Im 12 and I get a lot of this stuff but I need help on learning equations and symbols. Thanks for your time and consideration.

Shouldn't the peaks and crests of the electric wave be shifted by pi/2 from the peaks and crests of the magnetic wave. IE, when the electric waive is at maximium, the magnetic wave is at o?

Even an dummy like me can understand this! Chapeau, MrPhysicsA!!!!!

Thank u Dr.

Thanks so much!

Is cosmic ray particle radiation, different from electromagnetic wave? At 5:09 you add cosmic ray to the very left end of spectrum, left to the gamma ray.

why after reaching a particular frequency , the intensity decreases???

That's excellent.

Question: at about 2:13 you say the magnetic field is very,very much smaller than the electric field. What does that mean? Less energy? Slower to change? Perhaps it doesn't radiate as far before a reversal? Something else? Do you have a video explaining the fine point of "smaller" in this context. Thank you.

Radio 4 still broadcasts on Long Wave.

Keep it up!

maybe pressure has to do with the waveband magentic field energy is interacting with according to 0db light and magnetic field anomally???

How to get DrphysicsA lectures downloaded? It is necessary for me as i m from remote region where internet facility is not so much acess always.Besides these lectures give really a boost to ones carrier in academic purposes.So, plz provide me the link where i can download these lectures.

What's the difference between k and r in PV eqn

Bravo!

correct. also same if you pass a current under water;).. magnetic waves in conservation with vlf (atomic paralax)

What is flame then? Where does it fit in?

Comparing magnetic with electric field strength is a bit erroneous as the units are different and needs some explanation. If you calculate the energy density associated with each, the E squared and the B squared, then these energy densities will be the same by symmetry of universal laws in vacuum. This is probably telling us to use better system of units. Volts per metre and Tesla are a bit colloquial .

tusen takk

In the scale line of frequency and wavelength,going from left to right,the order is cosmic ray, Gramma ray, X ray,and before visible light, there is ultraviolet light, not big deal, just want to make it complete

Nothing quite like DrPhysicsA!!

what if energy db were raised harmonically from atomic acoustic? energy phenomena??

Actually, I don't get the use of "degrees" at all when talking about temperature.

Danielle Goodman... so when scientists are "surprised" that the universe is expanding, you are not because of the notion "every action has a reaction". could you please describe your theory of cosmic expansion as a "reaction" and then maybe also explain the "action" leading to it? does it expand at the same rate or does it accelerate? in case of accelerated expansion, would that be because of more "actions"? :-P

infra red and u.v. are resonance charges

نحتاج ترجمه ، اي احد يترجم الفديو جزاكم الله خيراً ..

WHAT HAPPENS IF YOU PUT A MAGNET IN A TESLA COIL?

Cosmic rays are a mixture of various particles lie protons electrons and muons as well as high frequency photons, gamma rays and x rays ( gamma and x rays definition is a bit of overlap but generally gammas are higher frequency, the artificial definition depended on the source though a high frequency x ray is identical to low frequency gamma in that convention). Cosmic rays should not really be plonked at the high frequency end of EM spectrum. Good video in general imo.

Okay so how can a blackbody absorb all wavelengths when atoms/molecules have discrete energy levels?

Okay but, who's watching a video on quantum mechanics and doesn't know the EM spectrum? Maybe the UK is different but in the US that's taught in early middle school (And repeated in several other years). Eh, can't complain though, I suppose it makes the videos more accessible.

language easy WOW . thank you

in other words p and v = c (dynamics) what if e=ohmc^v??

Well, no… However, regardless of your opinion it's not called "degrees Kelvin" so why say it?

Too many "YT professors" need to see this.

theoretically energy db near atomic accoustic is electrically conductive..

either protons or neutrons..

the light spectrum represents an atom

what of E=Ohmc^v??

The Kelvin and Degrees scale share intervals in the sense that a change in 1 degree is the same as a change in kelvin. But it's wrong to refer to 'degrees kelvin' as it doesn't exist.

basically absolute zero is a charge..

I'm sorry sir, but when we said "Kelvin" we didn't used "degree".

I appreciate your videos very much. There's a mistake toward the end of this video. At the risk of sounding overly pedantic, you referred to temperature in degrees Kelvin which is nonsensical. Temperature expressed in Kelvin is simply Kelvin.

oops what if..

Actually cosmic waves are not EM waves, they are very high energy protons, helium and less so hevier elements atoms which are close to the speed of light.

yayyyy, 2nd comment.

learned using sign language math

pv/t=c i understand tht.. it all = c...lol

I only watched this video 2 minutes so far, and already noticed two errors. First, it is Max plank, and not Plank and Einstein, who resolved the UV Catastrophe with "packets" of energy that were not modeled after particles but after oscillators. Einstein brought forth the photons in a paper (published in 1905) that explained the photo electric effects amongst which the photosynthesis of plants. (It is that paper who gave him the Nobel prize.) Second, the drawing of the perpendicular electric and magnetic fields shows the magnetic and the electric fields as simultaneous (see at 1:52) while they are actually related ad the sinus and the cosinus of time. Only this "delay" between the sin and the cos accounts for conservation of energy : the energy converts back and forth from electric to magnetic, respecting the relation sin^2(wt) + cos^2(wt) = 1 where w (should actually be the greek letter omega) is the angular frequency. (This is a basic transform from the trigonometric law sin^2(a) + cos^2(a) = 1 where "a" is any angle expressed in radians). P.S. I don't know why, but the second error is EXTREMELY wide spread on the Internet.

Good videos are always in bad quality 😂

Einstein only got this idea because of Nikola Tesla

amps, volts, temp. absolute zero = volt amp=0, temp=1 absolute zero(db) = wave, volt=1 amp=1 mf*=temp