Wave Optics PYQs - Last 5 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...