Question

6. If the refractive index of glass with respect to air is 3

2

, then the refractive

index of air with respect to glass is .................... .

(a)

4

8

(b) 3 (c)

1

3

(d)

12

18

7. A ray of light strikes a glass slab at an angle of 50º with the normal

to the surface of the slab, what is the angle of incidence?

(a) 50º (b) 25º (c) 40º (d) 100º

Answer 1

D 12 / 18 ........2/3