science
Grade-7
Easy
Question
The unit of the refractive index is ___.
- m/s
- Degrees
- m
- It is unitless
Hint:
Recall the formula of refractive index.
The correct answer is: It is unitless
The correct answer is d) It is unitless.
The refractive index of a medium is equal to the ratio of speed of light in vacuum to the speed of light of the medium.
For example, we will calculate the refractive index of water:
n=299792.46 / 228850 = 1.333.
The refractive index of water is 1.333 or 1.31.
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