What is the complementary color of green?

In the dispersion of white light by a prism,which color of light undergoes the minimum deviation?

$A$ narrow beam $PQ$ of white light is passing through a glass prism $ABC$ as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen $DE$.
$(i)$ Write the name and cause of the phenomenon observed.
$(ii)$ Where else in nature is this phenomenon observed?
$(iii)$ Based on this observation,state the conclusion which can be drawn about the constituents of white light.

Light rays entering the eye are refracted by the lens and form an image on a specific part of the eye. What is this part called?

Define dispersion of white light and name the colours of white light in order.

The twinkling of stars is due to atmospheric: