Question

16. A ray of light is incident on a glass slab (ng = 1.5),
thickness t. in such a manner that the angle of
refraction is 30°, then the sine of angle of incidence
will be
​

Answer 1

Explanation:

n= sini/sinr

n×sinr =sini

1.5×sin30=sini

1.5×0.5=sini

0.75= sini