(i) Draw a ray diagram to show the refraction of light through a glass slab and mark angle of refraction and the lateral shift suffered by the ray of light while passing through the slab.
(ii) If the refractive index of glass for light going grom air to glass is 3/2, find the refractive index of air for light going from glass to air.

Explanation

Diagram
Marking `/_r` and x (ii) `""_(a)n_(g)=3/2`
`""_(a)n_(g)=1/(""_(a)n_(g))=1/(3//2)=2/3`
Alternately, `(c_("air"))/(c_("glass"))=3/2`
`(c_("glass"))/(c_("air"))=2/3`