huygens wave principle and laws of reflection and refraction from huygen principle proof , physics

huygen principle states :
1. every point on given web front called primary wave front acts as a fresh source of disturbance called secondary wavelet which spreads in all direction with the speed of light.
2. the tangential surface touching these secondary wavelet in forward direction gives the position of new wave front called secondary wave front.

it can prove both law of reflection and refraction , which is shown in the video i hope i could help you learn ,

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