science
Grade-7
Easy
Question
The minimum value of the refractive index is ___.
Hint:
It is a whole number.
The correct answer is: 1
The minimum refractive index is 1. Refractive index is the measure of how briskly light travels through a medium. The formula of refractive index is : n=c/v
Here, n stands for refractive index, c stands for speed of light and v stands for phase velocity of light. Refractive index is dimensionless and therefore is unitless i.e it has no unit.
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