Q1.
A light ray enters from medium A to medium B as shown in Figure given below.
The refractive index of medium B relative to A will be:
(a) Greater than unity
(b) less than unity
(c) equal to unity
(d) zero
Q2.
Speed of light in water is 2.26 × 108 m/s and speed of light in glass is 2 × 108 m/s. If light is entering from water to glass,
(a) find the refractive index of glass with respect to water.
(b) find the refractive index of water with respect to glass.
Q3.
The refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?
Q4.
The refractive index of medium ‘X’ with respect to medium ‘Y’ is 2/3 and refractive index of medium ‘Y’ with respect to medium ‘Z’ is 4/3. Find the refractive index of medium ‘Z’ with respect to medium ‘X’.
Q5.
The refractive index of glass with respect to air is 1.65 and that of water w.r.t air is 1.33. Calculate refractive index of water w.r.t to glass.
Q6.
If the angle of incidence (i) for a light ray in air be 45 ͦ and the angle of refraction (r) in glass be 30 ͦ, find the refractive index of glass w.r.t air.
Q7.
In an experiment with a glass slab, a student observed that a ray of light incident at an angle of 60 ͦ with the normal on one face of the slab, after refraction, strikes the opposite face of the slab before emerging out in air making an angle of 42 ͦ with the normal. Draw a labelled diagram to show the path of this ray. What would be the value of angle of refraction and angle of emergence?
