$A$ 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.

(N/A) The diagram is as shown in the reference image.
$(i)$ The phenomenon is called the dispersion of light. It occurs because different wavelengths of light travel with different speeds in the glass prism,causing them to bend at different angles.
$(ii)$ This phenomenon is observed in nature in the formation of a rainbow.
$(iii)$ White light consists of seven different colors (wavelengths),which are violet,indigo,blue,green,yellow,orange,and red.