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Is it true that refraction occurs because light slows down in denser materials?

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a

True

b

False

answer is A.

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Detailed Solution

The above statement is True.
The refractive index of a substance is defined as the ratio of the speed of light in the vacuum to the speed of light in the substance. Mathematically,

Refractive index = \frac{speed of light in vacuum}{speed of light in the substance}

The refraction of light is due to the change in the speed of light going from one medium to another. The speed of light rays slows down in denser materials.

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