science
Grade-7
Easy
Question
The unit of the refractive index is ___.
- m/s
- Degrees
- m
- It is unitless
Hint:
Unitless
The correct answer is: It is unitless
- Refractive index of a medium is the ratio of the speed of light in vacuum to the speed of light in the medium.
- Therefore, it has no units.
- So, the correct option is d.
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