Momentum of EM waves | EM Waves | Physics | Khan Academy

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Created by Vibhor Pandey

[@KuldeepSharma-cv3nn]

No title like for jee,boards, neet he is teaching physics for physics

[@shivensaini3643]

Thank you very much sir, been searching this topic today.

[@anaghaavi9391]

i really love you guys.....khan academy ❤

[@unimaginableboi7164]

very interesting thank you

[@user-vy5hf4ei1x]

Thank you very much sir

[@enlightenphysicswithritika3936]

amazing amazing amazing

[@virupannamedikinal]

Thank you Sir.

[@philoso377]

Nice video and presentation. Problem 1. Momentum is zero with zero mass. Problem 2. On page 5:30 that E, in red, is presented always pointing up. However E of electromagnetic light is time variant. So E and B will produce a time varying force F pointing left and right alternating in time. Essentially F is net zero in any direction direction. Remember, seeing can’t justify believing. Seeing can sometime be deceiving. Think and scrutinize after seeing is real learning.

[@GuerrasLaws]

“The God Equation” Energy (E ) times momentum (p) equals Everything Ep = everything ~Guadalupe Guerra ©

[@altmashmalik8757]

Make videos on theory of relativity length time mass

[@jefferyjimson8574]

how to objects stay the same colour - if the frequency of the re-emitted photon is dependent on the frequency of the photn the electron absorbed, how does an atom continuously produce a photon of the same colour/ why is an atoms colour constant?

[@nezukochan471]

dayum

[@SivaKumar-hk7qy]

Why the force due to electric field is not considered for calculating total average force??

[@4m0d]

because its sinusoidal, ie. averages out to zero overtime as its oscillating, thus it doesnt deliver any momentum in the plane of electric field oscillation averaged over time.

[@scienceaffairs2919]

​@@4m0dbro magnetic field is also sinusoidal😅😅

[@lakshverma7850]

The reason for cancelation of force fue to E in sinusoidal nature of wave , but force due to B doesn't cancel because the velocity is continuously increasing with in turn increases the force as time goes, so the cancellation does not happens 100% .

[@sgiri2012]

Mahesh sir ?

[@edupugantivenkat7093]

Hey.....so that means when the speed of light is very small [Imagine] then the force exerted by it is large?? It doesn't make any sense!!

[@VersaceUnderwear]

you mean your question does not make any sense right?

[@edupugantivenkat7093]

yes..but what he said was this only@@VersaceUnderwear

[@user-cv6eb4io1j]

it makes sense if u take a look at debroglie equation and behaviour of large objects which have large mass, low speed due to it and causing large amount of force and showing almost negligible wavelength. but obviously speed of light is never going to slow down. so that ain't happening..

[@nezukochan471]

nani

[@sjdnfjnj]

lol