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Questions  

A plane strip suspended by string on  which monochromatic light is incedent on strip  have power P. Find deflection of string from vertical if strip is perfect black body

a
tan−1(mgcP)
b
cos−1(mgcP)
c
tan−1(Pmgc)
d
tan−1(2mgcP)

detailed solution

Correct option is

Tcosθ=mgTsinθ=Pc

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