Question

With the help of a labelled ray diagram show the path followed by a narrow beam of monochromatic light when it passes through a glass prism. What would happen if this beam is replaced by a narrow beam of white light?

Answer 1

Path of monochromatic light passing through a glass prism

1. The path of monochromatic light is as follows,
   

Path of white light passing through a glass prism

1. The path of white light is as follows,
   

Due to refraction, the route of monochromatic light going through a glass prism deviates from the true path, but it does not display light dispersion, whereas a white beam is scattered into seven colours.