Wave Optics

In a YDSE, the light of wavelength $\lambda=5000 Ã$ is used, which emerges in phase from two slits a distance $\mathrm{d}=3 \times 10^{-7} \mathrm{~m}$ apart. Atransparent sheet of thickness $\mathrm{t}=1.5 \times…

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:

When unpolarized light is incident at an angle of$60^{\circ}$on a transparent medium from air. The reflected ray is completely polarized. The angle of refraction in the medium is

Two polaroids$A\text{and}B$are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another polaroid $C$ is placed between $A\text{and}B$ bisecting angle between them. If intensity…

An unpolarised light beam of intensity $2I_{0}$ is passed through a polaroid $P$ and then through another polaroid $Q$ which is oriented in such a way that its passing axis makes an angle of $30^{\circ}$ relative to…

In the figure below,$P$ and$Q$ are two equally intense coherent sources emitting radiation of wavelength$20m.$ The separation between$P$ and$Q$ is$5m$ and the phase of$P$ is ahead of that of$Q$ by$90^{\circ}.A,B$ and C…

Given below are two statements : Statement I : If the Brewster's angle for the light propagating from air to glass is $\theta\,_{B}$, then Brewster's angle for the light propagating from glass to air is…

The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness t and refractive index $\mu\,$ is put in front of one of the slits, the central maximum gets…

Two coherent sources of sound, $S_{1}$ and $S_{2},$ produce sound waves of the same wavelength $\lambda\,=1m$arein phase. $S_{1}$and $S_{2}$are placed $1.5m$ apart (see fig). A listener, located at $L$, directly in…

The box of a pin hole camera, of length L, has a hole of radius a. It is assumed that when the hole is illuminated by a parallel beam of light of wavelength $\lambda\,$ the spread of the spot (obtained on the opposite…

Using monochromatic light of wavelength $\lambda\,$,an experimentalist sets up the Young's double slit experiment in three ways as shown. If she observes that $y=\beta\,^{'}$,the wavelength of light used is :

Unpolarized light of intensity $I$ passes through an ideal polariser $A$. Another identical polariser $B$ is placed behind $A$. The intensity of light beyond B is found to be $\frac{I}{2}$. Now another identical…