The time required for light to pass through a glass slab of 2 mm thickness is (µglass = 1.5)
Answer & explanation
Correct answer: option 3
$t=\frac{d}{V}=\frac{d}{c / \mu}=\frac{d . \mu}{c}=\frac{2 \times 10^{-3} \times 1.5}{3 \times 10^8} sec=10^{-11} sec$