A double-slit experiment is immersed in a liquid of refractive index 1.33. It has slit separation of 1 mm and distance between the plane of slits and screen is 1.33 m. The slits are illuminated by a parallel bam of light whose wavelength in air is `6830 Å`. Then the fringe width is

Options

A. `6.3 xx 10^(-4) `m
B. `8. 3 xx 10^(-4)`m
C. `6.3 xx 10^(-2) `m
D. `6.3 xx 10^(-5) `m

Answer

A

Explanation

`B_(m) = (B_("air"))/(mu) = (D lambda)/(d xx mu) = 6.3 xx 10^(-4)` m