234
Question
Which of the following does not disperse the white light into its components?
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Solution
The correct option is C Rectangular glass slab
When light enters the first surface of a rectangular slab there is dispersion because each color is bent (refracted) a different amount. But when the dispersed light leaves the second surface, which is parallel to the first surface, each color is refracted back so the colors recombine to give back white light.
When light enters the first surface of a rectangular slab there is dispersion because each color is bent (refracted) a different amount. But when the dispersed light leaves the second surface, which is parallel to the first surface, each color is refracted back so the colors recombine to give back white light.
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