Light of wavelength 6000Å is normally incident on a slit. Angular position of second minimum from central maximum is `30^@`. Width of the slit should be –

Options

A. `12 times 10^-5 cm`
B. `18 times 10^-5 cm`
C. `24 times 10^-5 cm`
D. `36 times 10^-5 cm`

Answer

C