Q1.
If the speed of light in vacuum is 3 x 108 ms-1, find the speed of light in a medium of absolute refractive index 1.5.
Q2.
The refractive index of some medium are given below:
Crown glass – 1.52
Water – 1.33
Sapphire – 1.77
(i) In which of the medium is the speed of light maximum and why?
(ii) Calculate speed of light in sapphire.
Q3.
With respect to air, Refractive index of kerosene is 1.44 and that of diamond is 2.42. Calculate refractive index of diamond with respect to the kerosene.
Q4.
You are given water, mustard oil, glycerine and kerosene of refractive indices 1.33, 1.47, 1.473, 1.44 respectively.
(i) In which medium will the speed of light be maximum.
(ii) In which of these media a ray of light incident obliquely at the same angle would bend the most? Give reason for your answer.
Q5.
Find the absolute refractive index of a medium in which light travels with a speed 2.25 × 108 ms−1. Given the speed of light in vacuum is 3 × 108 ms−1.
Q6.
Draw a labelled ray diagram to show the path of a ray of light travelling from diamond to water. The refractive indices of diamond and water are 2.42 and 1.33 respectively.
Q7.
Consider three indices of refraction:
glass – 1.52;
air – 1.0003 and
water – 1.33
Arrange the materials in decreasing order of speed of light through them.
Q8.
Consider three indices of refraction:
glass – 1.52;
air – 1.0003 and
water – 1.33
Arrange the materials in decreasing order of speed of light through them.
Q9.
Refractive index of two material mediums X and Y are 1.3 and 1.5 respectively. In which of the two, the light would travel faster?
Q10.
A glass slab made of material of refractive index n1 is kept in a medium of refractive index n2. A light ray is incident on the slab. Draw the path of the rays of light emerging from the glass slab if :
(i) n1 > n2
(ii) n1 = n2
