A -thick transparent slab causes a light pulse to emerge later than it would after…

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

5.0\,\text{mm}

-thick transparent slab causes a light pulse to emerge

20\,\text{ps}

later than it would after traveling the same distance in vacuum. Which of the following is the best estimate of the slab’s index of refraction? (a)

1.45

(b)

2.2

(c)

1.20

(d)

1.83