A linear aperture whose width is 0 02 cm is placed

Last updated: 6/26/2023

A linear aperture whose width is 0 02 cm is placed immediately in front of a lens of focal length 60 cm The aperture is illuminated normally by a parallel beam of wavelength 5 x 105 cm The distance of the first dark band of the diffraction pattern from the centre of the screen is a 0 10 cm b 0 25 cm c 0 20 cm d 0 15 cm