In Young's double slit experiment, slit separation is `0.6 mm` and the separation between slit and screen is `1.2m`. The angular width is (the wavelength of light used is `4800Å`)

Options

A. `4xx10^(-4)` rad
B. `10xx10^(-4)` rad
C. `8xx10^(-4)` rad
D. `12xx10^(-4)` rad

Answer

C

Explanation

Angular width `theta=x/D=(Dlamda)/(Dd)=(lamda)/d`

`:.theta=(4800xx10^(-10))/(0.6xx10^(-3))`
`=8xx10^(-4)` rad