Optics Question 752

Question: What is the time taken (in seconds) to cross a glass of thickness 4 mm and μ = 3 by light

[BHU 1998; Pb. PMT 1999, 2001; MH CET 2000; MP PET 2001]

Options:

A) 4×10−11

B) 2×10−11

C) 16×10−11

D) 8×10−10

Show Answer

Answer:

Correct Answer: A

Solution:

t=μxc=3×4×10−33×108=4×10−11 sec

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