Consider a monochromatic ray incident on a film of uniform thickness t and refractive index . Derive the condition for a dark fringe, when viewed from the same side of the film.
Briefly explain how bright and dark fringes are formed on the screen in Young's double slit experiment.
Hence, derive the expression for the fringe width.
Assertion (A): To observe diffraction of light, the size of the obstacle/aperture should be of the order of 10-7 m.
Reason (R): 10-7 is the order of the wavelength of visible light.
In a Young's double slit experimental set-up, the intensity of the light waves from two coherent sources are in the ratio of 9 : 1. Find the ratio of intensity of bright and dark fringes in the interference pattern.
The frequency of a light wave in a material is 2 1014 Hz and wavelength is 5000 . The refractive index of material will be
In Young's double-slit experiment, light of wavelength 6000 Å is used to get an interference pattern on a screen. The fringe width changes by 1.5 mm, when the screen is brought towards the double slit by 50 cm.
Find the distance between the two slits.
In a Young's double-slit experiment, fringes are obtained on a screen placed a certain distance away from the slits. If the screen is moved by 5 cm towards the slits, the fringe width changes by 30 m Given that the slits are 1 mm apart, calculate the wavelength of the light used.
How will the intensity of maxima and minima in the Young's double experiment change, if one of the two slits is covered by a transparent paper which transmits only half of light intensity?
In Young's double-slit experiment, while using a source of light of wavelength 4500 , the fringe width obtained is 0.4 cm. If the distance between the slits and the screen is reduced to half, calculate the new fringe width.
Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 7.2 mm.
Calculate the wavelength of another source of laser light which produce interference fringes separated by 8.1 mm using same pair of slits.