Reflection laws proof using Huygen's principle | Wave optics | Physics | Khan Academy
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- Huygen's principle states that every point on a wavefront behaves as a source for secondary waves, whose common tangent (envelop) becomes the new wavefront. Using this principle, let's prove the laws of reflection
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Created by Mahesh Shenoy
Why is this video so underrated?????this is the perfect video for this concept
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Although i m starter 10th, still i understand 90%, that left 10% is of terminology and rules fr waves behavior like it should be perpendicular, wavefront, active pointd etc.
Bt i m sure as soon as i learn abt them it will be crystal clear fr me 😄😄😄😄
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1:40 finally found the use of setsquare.
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0:36 getting goosebumps.
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this is the first time i had to step away from my always go to tutor channel bec for the first time I couldn't understand their explanation about Huygen's....then I found this. Oh my gosh with the animations and everything thank you so much !! it is so thoughtful and thorough!! I can't visualize it so this really is so clear.
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It help me a lot to imagine the process which I can't able to imagine by only reading the books.
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Animation is amazing . Specially 0.47. It's just like a real feeling as if everything actually happening in front of me (3D) Thank you
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Victory for Huygen
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By the way, which software are you using for explanation.
Reply would be greatly appreciated!!
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But the angle between i&r is 90
Can someone explain me how the angle between surface and the reflected wavefront = r
The sum of a triangle is equal to 180 degrees. We have a 90 degree and a (90-r) degree. For that reason the missing angle is equal to r because 90+(90-r)+M(missing angle)=180 => M=180-[90+(90-r)] => M=180-180+r => M=r. I hope that you find it helpful.
Thanks a lot man! Now i understand it clearly
@@ΒασιληςΧουνταλος thnx 😁
Great, thanks. Besides this point, the video is flawless.
At 8:30 can someone explain this if outside angle is r and one inside angle is 90-r and other inside angle is also r?
I got the answer thanks..
Really fantastic
Thankyou
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Why reflected and incident wavefront have same speed
Because they're in the same medium.
Q. Light assummed a ray is for ray optics but here in wave optics, we still have rays together wavefront...🤷
AAA congruency rule would have been much easier to workout. But, anyway the video was wonderful.
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What do you mean by Huygens source getting activated?dosent it always remains activated
It's great thing about you sir that you motivate us to think and and Prove the conclusions by our own
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Which software you are using to draw the diagrams sir?
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Sir, Which software you are using?
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Creed
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Perfect explanation
Amazing illustration
Wait how does the mirror produce 2° waves???
reflection
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Huygen says...
Thanks man
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Thank you sir
Thank you
Can't you do it with one ray? Why can't you draw a wave front with one light ray?
yes we can draw , becoz.. rays are perp to w.f but in this case we need to get the angles similar.. aand to make that simple we need to check for congruency.. hence 2 rays
moreover for a plane wf. we need to take parallel rays so..
There is nothing called one wave of light. Its always a wavefront according to huygens
That the teaching
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