What is refractive index ?

A it is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
B it is defined as the product of speed of light in medium and in vacuum.
C it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .
D None of above

Correct Answer: it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .

Related Questions

পানির প্রতিসরাঙ্ক (Refractive index ) 1.33 - হলে পানিতে আলোর বেগ কত?
The refractive index of the ocean water:
Which of the following has the highest value of refractive index?

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