(a) Draw a ray diagram to explain the term angle of deviation.
(b) Wgy do the component colours of incident white light cplit into a spectrum whilepassing through a glass prism, explain.
(c) Draw a labelled ray diagram to show the formation of a rainbow.

Explanation

(a) Angle of deviation is the angle between extended incident ray and extendent emergent ray through a prism.
PQ = Incident Ray, RS = Energy Ray
`angle D=` Angle of Deviation

(b) The incident white light splits into a seven coloured spectrum as speed of different coloured light waves is different when these pass through the prism.
(c)