In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is

Options

A. `5.9` mm
B. `3.9` mm
C. `1.9` mm
D. `2.3` mm

Answer

A

Explanation

Width of fringe,
`barX=(lambdaD)/(d)`
`=(589x10^(-9)xx1.5)/(1.5xx10^(-4)m)`
`=589xx10^(-5)m`
`=5.89xx10^(-3)m`
`=5.9 mm`