Question

each and every point of the wavefront acts as
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Answer 1

Answer:

Every point on a wavefront is a source of wavelets that spread out in the forward direction at the same speed as the wave itself. ... Each point on the wavefront emits a semicircular wavelet that moves a distance . The new wavefront is a line tangent to the wavelets

Explanation:

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Answer 2

Answer:

It acts as a secondary source of wave.