List of top Physics Questions on Wave optics

According to Huygens principle the phase difference between oscillations of any two particles on a same wave front is ______ rad.
The wavelength of light while it is passing through water is \(540\,\text{nm}\). The refractive index of water is \( \frac{4}{3} \). The wavelength of the same light when it is passing through a transparent medium having refractive index of \( \frac{3}{2} \) is _________ nm.
Distance between an object and three times magnified real image is 40 cm. The focal length of the mirror used is ________ cm.
What is the relation between the group velocity and phase velocity in a non-dispersive medium?
Which phenomenon confirms the transverse nature of electromagnetic waves?
In a classic Young’s Double Slit Experiment, how does the fringe width change if the entire apparatus is immersed in water?
Two light sources of wavelengths \(450\,\text{nm}\) and \(550\,\text{nm}\) are used for YDSE with slit separation \(2.25\,\text{mm}\) and distance between the slits and the screen is \(1.5\,\text{m}\). Then the distance from central maxima for which minima of both wavelengths coincide is:
In a YDSE experiment, a transparent slab of refractive index 1.4 is placed in front of one slit. The fringe pattern shifts by 0.3 cm on the screen.
Given:
Screen distance = 60 cm
Slit separation = 1.5 mm
Thickness of the slab (in 碌m) is:
Which of the following are true for a single slit diffraction? A. Width of central maxima increases with increase in wavelength keeping slit width constant.
B. Width of central maxima increases with decrease in wavelength keeping slit width constant.
C. Width of central maxima increases with decrease in slit width at constant wavelength.
D. Width of central maxima increases with increase in slit width at constant wavelength.
E. Brightness of central maxima increases for decrease in wavelength at constant slit width.
A point source is kept at the center of a spherically enclosed detector. If the volume of the detector is increased by 8 times, the intensity will
In the Young's double slit experiment the intensity produced by each one of the individual slits is \(I_0\). The distance between two slits is \(2\,\text{mm}\). The distance of screen from slits is \(10\,\text{m}\). The wavelength of light is \(6000\,\text{\AA}\). The intensity of light on the screen in front of one of the slits is ________.
When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflected beam is linearly polarized. The angle of refracted beam with respect to the normal is ___. ($\tan^{-1}(1.52) = 57.7^\circ$, refractive indices of air and glass are 1.00 and 1.52, respectively.)
A particle having electric charge $3 \times 10^{-19}$ C and mass $6 \times 10^{-27}$ kg is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is $\alpha \times 10^{-12}$ m. The value of $\alpha$ is _________. (Take Planck's constant $= 6.6 \times 10^{-34}$ J.s)
The kinetic energy of a simple harmonic oscillator is oscillating with angular frequency of 176 rad/s. The frequency of this simple harmonic oscillator is _________ Hz. [Take $\pi = \frac{22}{7}$]}
Obtain an expression for fringe width in Young's double-slit experiment.

State Huygens’ Principle. Use it to prove the laws of reflection or laws of refraction at a plane surface.

In Young's double slit experiment with two different set-ups, the fringe widths are equal. If the ratio of slit separation is $2$ and the ratio of wavelengths is $\dfrac{1}{2}$, find the ratio of screen distances in both set-ups:
Light wave are incident from a medium of refractive index 2 making an angle $\theta$ with normal on to a medium of refractive index $2\sqrt{3}$. What should be the value of $\theta$ for which reflected wave and refracted wave will be perpendicular to each other.
Consider two statements given below: Statement-I: In YDSE, if distance between slits \& screen increases, fringe width also increases. Statement-II: If wavelength of light used in YDSE increases, fringe width also increases. Which of the following options is correct?
Statement-1 : Planner wavefronts are incident on a prism, remain planner after passing through prism, but if planner wavefronts are passed through a pin hole then wavefronts may become spherical.
Statement-2 : If slit width is increased then curvature of wave front increases.

The intensity at spherical surface due to an isotropic point source placed at its center is $I_0$. If its volume is increased by $8$ times, what will be intensity at the spherical surface? 

When an unpolarized light falls at a particular angle on a glass plate (placed in air). It is observed that reflected beam is completely polarized the angle of refracted beam with respect to the normal is : (Given : \(\tan^{-1}(1.52) = 57.3^\circ, \mu_{air = 1, \mu_{glass} = 1.52\))}
Lights from two independent sources are not coherent. Explain.
A Young's double slit apparatus has slits separated by \(0.28\,\text{mm}\) and a screen \(48\,\text{cm}\) away from the slits. The whole apparatus is immersed in water, and the slits are illuminated by red light \(\lambda=700\,\text{nm}\) in vacuum. The fringe width of the pattern formed on the screen is:
The largest wavelength of light falling on double slits separated by \(1.5\ \mu\text{m}\), for which there is a first-order maximum, is in the: