Interference & Diffraction Mock Tests

In Young's double slit experiment, the fringe width is 0.5 mm. If the distance between the slits and the screen is doubled and the separation between the slits is halved, the new fringe width will be:

A single slit of width 0.1 mm is illuminated by light of wavelength 600 nm. The screen is 1 m away. The width of the central maximum is:

In Young's double slit experiment, the ratio of intensities at maxima and minima is 9 : 1. The ratio of amplitudes of the two interfering waves is:

In single-slit diffraction, if the width of the slit is doubled, the size of the central maximum:

In Young's double slit experiment, the separation between the slits is 0.5 mm and the screen is 1.5 m away. If the wavelength of light used is 600 nm, the fringe width is:

A single slit of width a is illuminated by monochromatic light of wavelength λ. The first minimum in the diffraction pattern occurs at an angle θ given by:

In Young's double slit experiment, if the slit separation is halved and the distance to the screen is doubled, the new fringe width compared to the original fringe width will be:

In Young's double slit experiment, the ratio of intensities at maxima and minima is 9:1. The ratio of amplitudes of the two sources is: