A ray of light undergoes refraction when it enters from air to glass. Critical angle for glass - liquid boundary is `sin^1` (8/9). Determine the speed of light in liquid if speed of light in glass is `2x10^8 m/s`.

A ray of light undergoes refraction when it enters from air to glass.A picture is painted with blue, green and red colours. A glass slab is placed on this picture. Will the images of all these colours lie in the same plane in the slab when viewed from the top of the glass slab? Why?

If the speed of light in water is 2.25 xx 10^8 m/s Calculate the speed of light in glass.

If the speed of light in water is 2.25 xx 10^8 m/s Calculate the speed of light in vacuum .

Light obliquely travel from glass to air , critical angle of glass is 42^@ . Angle of incidence is 42^@ find its refracted angle ?