Question

describe how the colour of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Draw necessary diagram

Answer 1

the colour of white light is splitted due to the different velocities of different colors of light in a glass prism. and they can be recombined by placing an another prism of same type just in inverted position. it should look like this

Answer 2

from fig.. we see that prism A splits the white light and splited light is recombined by inverted prism Band a white light is seen in screen