A monochromatic light passes through a glass slab (μ = 1.5) of thickness 9 cm in time t1. If it takes a time t2 to travel the same distance through water (μ = 4 /3) . The value of (t1 - t2) is

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5 × 10–11 sec

5 × 10–8 sec

2.5 × 10–10 sec

5 × 10–10 sec

answer is A.

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Detailed Solution

∆t=μgdC-μwdC ; 32-439 x 10-23 x 108 =5 x 10-11 sec

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