Wave Optics

For Young's double slit experiment, two statements are given below. Statement I: In the interference pattern, energy is not destroyed at the dark fringes; it is simply redistributed to the bright fringes. Statement II:…

Which of the following condition is TRUE for Fresnel diffraction? (i) Source of light and the obstacle (slit) are at large distance (infinite) from each other. (ii) Wavefront incident on the obstacle (slit) is plane.…

The condition for observing Fraunhofer diffraction from a single slit is that the wavefront incident on a single slit must be

Unpolarized light of intensity $I_0$ is made to pass through three polarizers $P_1$, $P_2$ and $P_3$ successively. The polarization axis of $P_2$ makes an angle of $60^\circ$ with that of $P_1$, while that of $P_3$…

When light waves travel from rarer medium to denser medium, the qunatities which get changed are

Two images are considered "just resolved" according to Rayleigh's criterion when

The Brewster's angle $\theta_B$ for air-glass interface should be such that (refractive index of glass $= \dfrac{3}{2}$)

In Young's double-slit experiment, the intensity at a point is $\left(\dfrac{1}{4}\right)$ of the maximum intensity. The angular position of this point is $\{\lambda$ = wavelength of light used, d = separation between…

An unpolarised beam of intensity $I_{0}$ is incident on a pair of nicols making an angle of $60^{\circ}$ with each other. The intensity of light emerging from the pair is

A linear aperture whose width is $0.02 cm$ is placed immediately in front of a lens of focal length $60 cm.$ The aperture is illuminated normally by a parallel beam of wavelength $5\times\,10^{-5}\mathrm{}cm$. The…

A beam of light of $\lambda\,=600nm$ from a distant source falls on a single slit $1mm$ wide and the resulting diffraction pattern is observed on a screen $2m$ away. The distance between first dark fringes on either…

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: