A beam of light of wavelenght 600 nm from a distant source falls on a single slit 1.00 nm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is

Options

A. 1.2 cm
B. 1.2 mm
C. 2.4 cm
D. 2.4 mm

Answer

B, D

Explanation

Distance between the first dark fringes on either side = width of central maximum
`=(2Dlambda)/(d)=(2xx2xx600xx10^(-9))/(1.00xx10^(-3))=2.4xx10^(-3)m=2.4mm`