Question

1- The index of refraction given by
a) n = lamda2/lamda1
b) n=f2/f1
c) n = V2/V1

Answer 1

The correct answer is:
a) n = lambda2/lambda1
The index of refraction (n) of a medium is defined as the ratio of the wavelength of light in vacuum to the wavelength of light in the medium. It can be expressed as n = lambda_vacuum / lambda_medium, where lambda represents the wavelength.