Question

why do different colours of white light bend through different angles with respect to the incident beam of light

Answer 1

White light consists of 7 component colors and this colours have different wavelenghts and therefore different velocities. This makes them to bend by different angles with respect to the incident beam of light

Answer 2

different colours of white light
bend through different angles with
respect to the incident beam of
light because of the difference in
speed and wave length.
ex:- red has highest wave length ,
so it bends least, whereas blue
has lowest wave length so it bends
the most.