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Question
The unit of refractive index is ______.
Options
metre
degree
dioptre
it has no units
MCQ
Fill in the Blanks
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Solution
The unit of refractive index is it has no units.
Explanation:
Refractive index is the ratio of two similar physical quantities (the speed of light in vacuum to the speed of light in a medium), so it is a dimensionless quantity with no units.
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