Dispersion of white light by a glass prism occurs because
-
A.
white light consist of a mixture of seven different colour -
B.
the refractive index of glass is different from each constituent colour of white light -
C.
the speed of each colour of light in the glass is proportional to the refractive index of glass for each colour -
D.
the speed of each colour of light in the glass is proportional to the angle of refraction in he prism