Wave Optics PYQs - Last 10 Years

Two points of monochromatic and coherent sources of light of wavelength $\lambda$ each, are placed as shown in figure. The initial phase difference between the sources is zero, $(D \gg d)$. Mark the correct statement(s).

Beyond what distance，the ray optics is sufficiently valid when the aperture is 6 mm wide and the wavelength is $6000 \mathop {\rm{A}}\limits^{\rm{o}}$ ？

A single slit diffraction pattern is obtained using a beam of red light. If red light is replaced by blue light then

In a single-slit diffraction experiment, the slit is illuminated by light of two wavelengths \(\lambda_1\) and \(\lambda_2\). It is observed that the \(2^{\text {nd }}\) order diffraction minimum for \(\lambda_1\) coincides with the $$3^{\t...

Light of wavelength \(6000 \mathop A\limits^o\) is incident on a thin glass plate of r.i. 1.5 such that the angle of refraction into the plate is \(60^{\circ}\). Calculate the smallest thickness of the plate which will make dark fringe by r...

An interference pattern is obtained with two coherent sources of intensity ratio n : 1. The ratio \(\mathrm{{{{I_{\max }} - {I_{\min }}} \over {{I_{\max }} + {I_{\min }}}}}\) will be maximum if

X-rays of wavelength \(\lambda\) gets reflected from parallel planes of atoms in a crystal with spacing d between two planes as shown in the figure. If the two reflected beams interfere constructively, then the condition for maxima will be...

A ray of monochromatic light is incident on the plane surface of separation between two media \(\mathrm{X}\) and \(\mathrm{Y}\) with angle of incidence '\(\mathrm{i}\)' in medium $\mathrm{X}$ and angle of refraction 'r' in medium Y. The giv...

In Young's double slit experiment with a monochromatic light, maximum intensity is 4 times the minimum intensity in the interference pattern. What is the ratio of the intensities of the two interfering waves?

In a Young's double slit experiment, the intensity of light at a point on the screen where the path difference between the interfering waves is \(\lambda\), (\(\lambda\) being the wavelength of light used) is I. The intensity at a point whe...

In Young's double slit experiment, light of wavelength \(\lambda\) passes through the double slit and forms interference fringes on a screen 1.2 m away. If the difference between 3rd order maximum and 3rd order minimum is 0.18 cm and the sl...

In a Fraunhofer diffraction experiment, a single slit of width 0.5 mm is illuminated by a monochromatic light of wavelength 600 nm. The diffraction pattern is observed on a screen at a distance of 50 cm from the slit. What will be the linea...

The intensity of light emerging from one of the slits in a Young's double slit experiment is found to be 1.5 times the intensity of light emerging from the other slit. What will be the approximate ratio of intensity of an interference maxim...

In Young's experiment for the interference of light, the separation between the slits is d and the distance of the screen from the slits is D. If D is increased by 0.5% and d is decreased by 0.3% then for the light of a given wavelength , w...

When the frequency of the light used is changed from \(4 \times {10^{14}}{s^{ - 1}}\) to \(5 \times {10^{14}}{s^{ - 1}}\), the angular width of the principal (central) maximum in a single slit Fraunhoffer diffraction pattern changes by 0.6 ...

If Young's double slit experiment is done with white light, which of the following statements will be true?

Two monochromatic coherent light beams A and B have intensities L and \({{L \over 4}}\), respectively. If these beams are superposed, the maximum and minimum intensities will be