Define refractive index of a medium and express it mathematically.
What is the least distance of distant vision for the normal eye?
Does the above distance increase or decrease for long-sighted eye? Give reason for your answer with diagram.
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the ratio of the speed of radiation (such as light) in one medium (such as air, glass, or a vacuum) to that in another medium.
The ratio of the velocity of light V1 in medium 12 the velocity V2 in medium to is known as relative refractive index of medium to with respect to the medium one it is denoted by n21
N 2 1 is equal to v 1 divided by v 2
the refractive index of medium with respect to the vacuum is called the absolute refractive index of that medium
The ratio of the velocity of light V1 in medium 12 the velocity V2 in medium to is known as relative refractive index of medium to with respect to the medium one it is denoted by n21
N 2 1 is equal to v 1 divided by v 2
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