Question

Manu observes that the absolute refractive indices of two media given as in figure are 2.0 and 1.5 respectively and the speed of light in medium 'B' is 2 x 10⁸m/s.

1. Calculate the speed of light in vaccum?

a. 3 x 10⁸ m/s

b. 2 x 10⁸ m/s

c. 1 x 10⁸ m/s

d. None of these

2. Calculate the speed of light in medium 'A' ?

a. 3 x 10⁸ m/s

b. 1.5 x 10⁸ m/s

c. 1 x 10⁸ m/s

d . None of these

3. The value of refractive index of a medium with respect to the vacuum is known as?

a. Absolute refractive index

b. Snell's law

4. The light travel fastest in

a. Water

b. Air

c. Glass

d. Diamond

Answer 1

1. a. 3 x 10⁸ m/s

2. b. 1.5 x 10⁸ m/s

3. a. Absolute refractive index

4. b. Air