There space two phenomenon at play here. And also of course, towardsthe leaf of a lens its form resembles a prism.

1. Once light beginning s (transparent) solid, the velocity oflight in the new material will be different from the of air.You"ll have noticed a similar effect, when viewing a pencil partlyimmersed in a glass of water. You understand that the pencil is straight,but it appears to bending at the water interface.

2. The velocity of irradiate is no the very same for every colours in mostsubstances.

So the different colours in the light may show up to have beenbent an ext than others. So the beam the white irradiate is distributed intoa rainbow.

A problem in which there is no velocity dispersion because that thevarious frequencies of light is known as achromatic. Much thedesire that lens makers, and optical detectors.


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∙ 7y ago
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