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1. Define the refractive index of a medium.
The amount of refraction of light in a medium is denoted by a term known as the refractive index of the medium, which is the ratio of the to the .
It is also known as the absolute refractive index, and it is denoted by the Greek letter -
2. State Snell’s law of refraction.
Snell’s laws of refraction are given below:
• The incident ray, the refracted ray and the normal at the point of intersection, .
• The ratio of the to the is equal to the of the medium, which is a constant.
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