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Dispersion

A beam of whi...

Question

A beam of white light passes through two inverted prisms as shown.

The emergent beam of light from the second prism will be:

[0.8 mark]

A

White in colour

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B

Red in colour

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C

Yellow in colour

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D

A patch of seven different colours

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Solution

The correct option is A White in colour
First glass prism disperses the light into its constituent colours but the second inverted prism recombines all the colours back to the white beam of light.

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