Wave Optics Questions

A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of t...

In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten m...

For a parallel beam of monochromatic light of wavelength ′λ′, diffraction is produced by a single slit whose width ′a′ is of the order of the wavelength of the light. If &...

Young's double slit experment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive...

Two Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1 . A third polaroid P3 is kept in between P1 and P2 such that its axis makes an an...

In a diffraction pattern due to a single slit of width ‘a’, the first minimum is observed at an angle 30o whenlight of wavelength 5000 Aois incident on the slit. The first secondary maximu...

The intensity at the maximum in a Young’s double slit experiment is I0. Distance between two slits is d = 5λ, where λ is the wavelength of light used in the experiment. What will be th...

The angular width of the central maximum in a single slit diffraction pattern is 60°. The width of the slit is 1 μm. The slit is illuminated by monochromatic plane waves. If another slit of s...

Unpolarized light of intensity I passes through an ideal polarizer A. Another identical polarizer B is placed behind A. The intensity of light beyond B is found to be 1/2. Now another identical polari...

Unpolarised light is incident from air on a plane surface of a material of refractive index 'μ'. At a particular angle of incidence 'i', it is found that the reflected and refracted...

In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is f...

In the Young′s double slit experiment using a monochromatic light of wavelength λ, the path difference (in terms of an integer n) corresponding to any point having half the peak intensity i...

In a Young′s double slit experiment the intensity at a point where the path difference is (λ being the wavelength of the light used) is I. If I0 denotes the maximum intensity, is equal to...

A beam of light of λ = 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringe...

In Young′s double slit experiment, the interference bright fringes are of :

In Young′s experiment, monochromatic light through a single slit S is used to illuminate the two slits S1 and S2. Interference fringes are obtained on a screen. The fringe width is found to be w...

A light source, which emits two wavelengths λ1= 400 nm and λ2= 600 nm, is used in a Young′s double slitexperiment. If recorded fringe widths for λ1and λ2are β1and β...

In Young′s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 and λ2 = 10000. At what minimum distance from the common centra...

Two beams, A and B, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam A has maximum intensity (and beam B has zer...

In Young′s double slit experiment, the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width is