Statement I: Fringe width depends upon refractive index of the medium.
Statement II: Refractive index changes optical path of ray of light forming fringe pattern.

Options

A. Statement I is True, statement II is True, Statement II is a correct explanation for Statement I.
B. Statement I is Ture, Statement II is Ture, Statement II is NOT a correct explanation for Statement I.
C. Statement I is True, Statement II is False.
D. Statement I is False, Statement II is True.

Answer

b

Explanation

Wavelenght in a medium of refractive index `mu` is `lambda'= lambda//mu` where `lambda` is the wavelength in air. Fringe width,
`omega = (lambda D)/(d)`