Question

When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained what happens when a second identical prism is placed in the inverted position with respect to the first prism

Answer 1

Answer:

the white light when passes through first prism it gets seperated into its seven components but when all the seven components of that light passes through the second prism it becomes the white light again.so it comes out as white light from the second prism.