Solve this:

Q.   If a parallel beam of light of circular cross-section having radius 10 mm falls on the surface of glass slab μ   =   3 2   at an angle 30 ° with the surface of slab, then the radius of refracted beam is about

(1) 12.5mm                                          (2) 13.7 mm 
(3) 14.5 mm                                         (4) 16.2 mm 

Dear Student,

μ=1.5, r=0.01 m radius of beam =10sin601.5=16.3 mm Regards

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