JEE Physics - MCQ Practice Questions

A plane mirror is moved towards a stationary object at a distance of 10 cm from the mirror. What is the velocity of the image if the mirror moves with a velocity of 2 m/s towards the object?

A concave lens of focal length 20 cm forms an image at a distance of 10 cm from the lens. At what distance from the lens should the object be placed?

In Young's double slit experiment, the distance between slits is 0.5 mm, distance to screen is 1 m, and wavelength is 500 nm. What is the fringe width?

A light ray undergoes refraction from medium 1 (n₁ = 1.33) to medium 2 (n₂ = 1.5). If the angle of incidence is 30°, what is the angle of refraction?

The critical angle for total internal reflection from a denser medium to air (n = 1) is 45°. What is the refractive index of the denser medium?

A convex lens of power 5 diopters is placed at 15 cm from a plane mirror. An object is kept at 30 cm from the lens (on the opposite side of mirror). What is the position of final image?

In a single slit diffraction pattern, the first minimum occurs at an angle of 30°. If the slit width is doubled, at what angle will the first minimum occur?

A lens system consists of a convex lens (f₁ = 10 cm) and a concave lens (f₂ = -15 cm) placed in contact. What is the power of the combination?

A ray of light passes through a prism of angle A = 45° and refractive index n = 1.5. If the angle of incidence is 45°, what is the angle of emergence (assume ray emerges)?

In a diffraction grating with 5000 lines per cm, what is the grating constant (distance between adjacent slits)?

A converging lens forms a real image that is twice the size of the object. If the object distance is 15 cm, what is the focal length of the lens?

A polarizer and analyzer are set up with their transmission axes at 30° to each other. If unpolarized light of intensity I₀ passes through this arrangement, what is the transmitted intensity?

A convex mirror has a focal length of 30 cm. An object of height 5 cm is placed at 60 cm from the mirror. What is the height of the image?

In an interference experiment with two coherent sources, the path difference at a point on the screen is 2.5λ. What is the nature of interference at this point?

A telescope has an objective lens of focal length 80 cm and an eyepiece of focal length 5 cm. What is the magnifying power of the telescope in normal adjustment?

A ray of light is incident on a glass-air interface at an angle of 45°. The refractive index of glass is 1.5. Will total internal reflection occur?

In a laser experiment, the wavelength of light is 632.8 nm. What is the frequency of this light? (Take c = 3 × 10⁸ m/s)

Two plane mirrors are inclined at an angle of 45° to each other. How many images of an object placed between them will be formed?

A thin lens of refractive index 1.5 is placed in a medium of refractive index 1.33. If its focal length in air is 20 cm, what is its focal length in the medium?

In Fraunhofer diffraction through a circular aperture, the angular radius of the first dark ring (Airy disk) is θ = 1.22λ/D. For D = 1 mm and λ = 500 nm, what is this angle in radians?