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Question

A perfect reflecting mirror of mass M mounted on a spring constitudes a spring-mass system of angular frequency such that with h as Planck's constant. N photons of wavelength m strike the mirror simultaneously at normal incidence such that the mirror gets displaced by . If the value of N is , then the value of x is ____ . [Consider the spring as massless]

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JEE Advanced

Solution

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Correct option is
A

1

Momentum transferred on mirror =

   (where )
(where )




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