In the case of parallel beam,

intensity gradually increases

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intensity gradually decreases

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intensity remains constant

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None of these

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Solution

The correct option is D None of these
According to Huygens' theory, light always propagate in form of wavefront where all particles are in same phase. So intensity of light is maximum at wavefront and zero otherwise. So answer is D.

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In the case of parallel beam,

The correct option is D None of theseAccording to Huygens' theory, light always propagate in form of wavefront where all particles are in same phase. So intensity of light is maximum at wavefront and zero otherwise. So answer is D.

The correct option is D None of these
According to Huygens' theory, light always propagate in form of wavefront where all particles are in same phase. So intensity of light is maximum at wavefront and zero otherwise. So answer is D.