A narrow slit of width 2 mm is illuminated by monochromatic light of wavelength 500 nm. The distance between the first minima on either side on a screen at a distance of 1 m is

Options

A. 5 mm
B. 0.5 mm
C. 1 mm
D. 10 mm

Answer

B

Explanation

Difference `= (2 lambda)/(b) xx d`
`= (2 xx 5 xx 10^(-4))/(2) xx 100 = 0.5` mm