In Young's experiment , the fringe width of the fringes with light of wavelength 6000 Å is `2.0` mm . What will be the fringe width if the entire apparatus is immersed in a liquid of refractive index `1.33` ?

Options

A. `0.5` mm
B. 1 mm
C. 1.5 mm
D. 2 mm

Answer

C

Explanation

Fringe width `beta = 2mm = 2 xx 10^(-3)` m
`lambda = 6000 ` Å
`mu = 1.33`
`beta = ?`
`beta' = (beta)/(mu)`
`= (2)/(1.33) = 1.5` mm