Question

when a ray of light travelling in the air falls on a rectangular glass slab at an angle of 45° with the normal to the surface, then the angle made by the refracted ray with the normal inside the glass slab is equal to 30° what is the refractive index on the glass slab​

Answer 1

Answer:

Since, μ=

speedoflightinmedium

speedoflightinvacuum

μ

g

=

2×10

8

3×10

8

=1.5

r=90−i

Hence from Snell's law,

μ

1

sini=μ

2

sinr

1sini=

2

3

sin(90−i)

tani=

2

3

i=tan

−1

(3/2)=56.30