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Question

Explain the construction of plane wavefront using Huygen's principle.

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Solution

According to Huygens' principle, each point on a wavefront acts as a secondary source of light producing secondary wavelets in all directions. Let c be the velocity of light in air and 't' be the time after which position of the wavefront is to be found. During time 't' the light wave will travel a distance of 'ct'.


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