Question

state Huygens principle
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Answer 1

The Huygens's Principle states that every point on a wavefront is a source of wavelets. These wavelets spread out in the forward direction, at the same speed as the source wave. The new wavefront is a line tangent to all of the wavelets.

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Answer 2

Answer:

Huygens principle states that all the points of wave front of light in a vacuum or transparent medium may be regarded as new sources of wavelets that expand in every direction at a rate depending upon their velocities