List of top Physics Questions on Optics asked in IIT JAM PH

The shortest distance between an object and its real image formed by a thin convex lens of focal length 20 cm is _____ cm. (in integer)

A light beam given by $\mathbf{E}(z, t) = E_{01} \sin(kz - \omega t)\hat{i} + E_{02} \sin(kz - \omega t + \frac{\pi}{6})\hat{j}$ passes through an ideal linear polarizer whose transmission axis is tilted by 60$^\circ$ from x-axis (in x-y plane). If $E_{01} = 4$ V/m and $E_{02} = 2$ V/m, the electric field amplitude of the emerging light beam from the polarizer is ______ V/m. (up to two decimal places)

A wedge-shaped thin film is formed using soap-water solution. The refractive index of the film is 1.25. At near normal incidence, when the film is illuminated by a monochromatic light of wavelength 600 nm, 10 interference fringes per cm are observed. The wedge angle (in radians) is ______ $\times 10^{-5}$. (in integer)

For a thin convex lens of focal length f, the image of an object at O is formed at I, as shown in the figure below. The distances of object and image from the two focal points ($F_O$ and $F_I$) are $x_O$ and $x_I$, respectively. Which of the following graphs correctly represent(s) the variation of the quantities shown in the figure?

For a two-slit Fraunhofer diffraction, each slit is 0.1 mm wide and separation between the two slits is 0.8 mm. The total number of interference minima between the first diffraction minima on both sides of the central maxima is

An unpolarized light ray passing through air (refractive index $n_a = 1$) is incident on a glass slab (refractive index $n_g = \sqrt{3}$) at an angle of 60°, as shown in the figure below. The amplitude of the in-plane (x-y) electric field component of the incident light is 4 V/m and amplitude of the out of plane (z) electric field component is 3 V/m. After passing through the glass slab, the electric field amplitude (in V/m) of the light is

Two parallel light rays 1 and 2 are incident from air on a system consisting of media P, Q, and air, as shown in the figure below. The incident angle is 45°. Ray 1 passes through medium P, air and medium Q and ray passes through media P and Q before leaving the system. After passing through the system, the angular deviation (in radians) between the two rays is

The dimensions of the media and their refractive indices ($n_a, n_P$ and $n_Q$) are shown in the figure

A collimated beam of laser light of wavelength 514 nm is normally incident on a smooth glass slab placed in air. Given the refractive indices of glass and air are 1.47 and 1.0 respectively, the percentage of light intensity reflected back is:

A thin lens of refractive index $ \frac{3}{2} $ is kept inside a liquid of refractive index $ \frac{4}{3} $. If the focal length of the lens in air is 10 cm, then its focal length inside the liquid is

Consider a convex lens of focal length $f$. The lens is cut along a diameter into two parts. The two lens parts and an object are kept as shown in the figure. The images are formed at the following distances from the object:

Consider a convex lens of focal length $f$. A point object moves towards the lens along its axis between $2f$ and $f$. If the speed of the object is $V_o$, then its image would move with speed $V_i$. Which of the following is correct?

An anti-reflection film coating of thickness 0.1 μm is to be deposited on a glass plate for normal incidence of light of wavelength 0.5 μm. What should be the refractive index of the film?

Intensity versus distance curve for a double slit diffraction experiment is shown in the figure below. If the width of each of the slits is 0.7 μm, what is the separation between the two slits in micrometers?

Intensity versus distance curve for a double slit diffraction experiment is shown in the figure below. If the width of each of the slits is 0.7 $ \mu $m, what is the separation between the two slits in micrometers?

An anti-reflection film coating of thickness 0.1 $ \mu $m is to be deposited on a glass plate for normal incidence of light of wavelength 0.5 $ \mu $m. What should be the refractive index of the film?

Which of the following is due to inhomogeneous refractive index of earth’s atmosphere?