When a white light ray falls on a prism, the ray at its first surface suffers:
(a) no refraction
(b) only dispersion
(c) only deviation
d) both deviation and dispersion
When a white light ray falls on a prism, the ray at its first surface suffers:
(a) no refraction
(b) only dispersion
(c) only deviation
d) both deviation and dispersion

When a white light ray strikes a prism, it experiences both deviation and dispersion at its first surface.