science
Grade-7
Easy
Question
The least value of the refractive index of a material among all is ___.
Hint:
Refractive Index: It is the ratio of velocity of light in vaccum to the velocity of light in the specific medium.
The correct answer is: 1
Air has the lowest value of refractive index. Refractive index is the measure of the bending of a ray of light when passing from one medium into another.
It is the ratio of velocity of light in vaccum to the velocity of light in the specific medium.
So in air, velocity of light in vaccum is equal to velocity of light in air.
The minimum value of Refractive Index is 1 that is of air.
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