Wave Optics

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…

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

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.…

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:…

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

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

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

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 thin film of soap solution $\left(\mu_s=1.4\right)$ lies on the top of a glass plate ($\mu_g=1.5$). When incident light is almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 420…

Two identical coherent sources placed on a diameter of a circle of radius $R$ at separation $x(\ll R)$ symmetrically about the centre of the circle. The sources emit identical wavelength $\lambda$ each. The number of…

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