In Young's double slit experiment, distance between two sources is 0.1mm. The distance of screen from the sources is 20cm. Wavelength of light used is `5460 Å`. Then, angular position of first dark fringe is approximately

Options

A. `0.08^(@)`
B. `0.16^(@)`
C. `0.20^(@)`
D. `0.32^(@)`

Answer

B

Explanation

The position of `n^(th)` dark fringe. So position of first dark fringe in `x_(1)=lamdaD//2d`.
`d=20cm,D=0.1mm,lamda=5460Å,x_(1)=0.16^(@)`