Q17 of 234 Page 288

What will happen if another similar glass prism is placed upside down behind the first prism?

When another similar glass prism is placed upside down behind the first prism, then the seven colored rays from the first prism which are incident on the second prism recombine to form the original white beam.


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16

Why do different coloured rays deviate differently in a prism?

 17

What happens when a ray of ordinary light is passed through a triangular glass prism?

 18

When a beam of white light is passed through a prism, it splits to form lights of seven colours. Is it possible to recombine the lights of seven colours to obtain the white light again? Explain your answer.

 19

What is spectrum? What is the name of glass shape used to produce a spectrum?