(i) Write two points to distinguish between interference and diffraction fringes.
Channel: Doubtnut
Date: 2020-01-03

(i) Write two points to distinguish between interference and diffraction fringes. (ii) In a Young \'s double slit experiment , fringes are obtained on a screen placed at certain distance away from the slits . If the screen is moved by 5 cm towards the slits , the fringe width changes by 30 `mu m` . Given that the slits are 1 mm apart , calculate the wavelength of the light used.