In a Young's double slit esperiment, the angular width of a fringe formed on a distant screen is `1^(@)` . The slit separation is 0.01 mm. The wavelength of the light is

Options

A. `0.174` nm
B. `0.174Å`
C. `0.174mum`
D. `0.174xx10^(-4)` m

Answer

C

Explanation

Angular fringe wudth, `theta=(lambda)/(d):. Lambda=thetad`
Here, `d=0.01mm=10^(-5)m, theta=1^(@)=(pi)/(180)` radians
`lambda=(pi)/(180)xx10^(-5)=1.74xx10^(-7)m`
`=0.174xx10^(-6)m=0.174mum`