PHYS 201 | Fermat's Principle 3 - From Fermat to Snell

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Fermat's ideas about light even jive with Snell's Law of refraction. Are Fermat and Huygens's ideas the same at some deep geometrical level? Probably. But it's not really physics so let's move on.
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Thank you. Very good lesson, you explained it well

awemanyfit
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Amazing video..but criminally underrated

scienceislove
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Hello sr I'm from Pakistan that amazing

ImranRaza
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Can u say that why did u taken minus before derivative of (L-x)^2 ?

VinodhPynam
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Hi You are so great
I want to connect with you

bheemsen
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Very bad teaching. First of all, you've written v twice. Instead it should be v1 and v2. Second you've omitted the part of refractive index and skipped to an automatic substitution. 2/10 graded for teaching. Please consider improving next time.

RecklessEngineering