SATHEE: Optics Question 746

Optics Question 746

Question: Time taken by the sunlight to pass through a window of thickness 4 mm whose refractive index is 1.5 is

[CBSE PMT 1993]

Options:

A) $2 \times 10^{- 8}$ sec

B) $2 \times 10^{8}$ sec

C) $2 \times 10^{- 11}$ sec

D) $2 \times 10^{11}$ sec

Show Answer

Answer:

Correct Answer: C

Solution:

Velocity of light in the window = $\frac{3 \times 10^{8}}{1.5} m s^{- 1}$

$= 2 \times 10^{8} m s^{- 1}$

Hence $t$ = $\frac{4 \times 10^{- 3}}{2 \times 10^{8}} s = 2 \times 10^{- 11} s$

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Optics Question 746

Question: Time taken by the sunlight to pass through a window of thickness 4 mm whose refractive index is 1.5 is

Options:

Answer:

Solution:

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