Explain the refraction of light through a glass slab with a neat ray diagram `(AS_(5))`

Show that for refraction of light through a parallel glass slab, the incident ray and the emergent ray are parallel to each other. Or, With the help of a diagram show how in case of a rectangular glass slab, when light is refracted by the two parallel faces of the slab, deviation between angle of incidence and angle of refractive is zero.

Explain the laws of refraction with the help of ray diagram.

Explain froth flotation process with neat diagram.

What is dispersion of light? Will there be dispersion of white light within a glass slab after refraction when white light is incident on the glass slab at an angle of 45^@ ?

What is the time taken by light to travel through a glass slab of thickness ‘d’ and refractive index mu ?

An ink dot on a sheet of paper is viewed from above a distance of 50 cm. By what distance would the ink dot appear to be raised if it is viewed through a glass slab of thickness 15 cm held parallel to the appear? Given refractive index of glass = 1.5.

A ray of light will go from diamond to glass. What should be the minimum angle of incidences at the surface of separation of the two media, diamond and glass, so that the ray of light cannot be refracted in glass ? mu of glass = 1.51 and mu of diamond = 2.47, sin37.69^(@) = 0.61134