JEE Physics - MCQ Practice Questions

A light ray travels from air into glass with refractive index 1.5. If the angle of incidence is 30°, what is the angle of refraction?

Which of the following phenomena demonstrates the wave nature of light?

The focal length of a convex lens is 15 cm. An object is placed at 30 cm from the lens. Find the position of the image.

What is the critical angle for total internal reflection when light travels from glass (n=1.5) to air (n=1)?

A plane mirror is placed 50 cm from an object. The distance between the object and its image is:

A thin lens has power +5 diopters. Find its focal length.

A ray of light travels from medium 1 (refractive index n₁ = 1.5) to medium 2 (refractive index n₂ = 1.0). If the angle of incidence is 30°, what is the angle of refraction?

A concave mirror produces a real, inverted, and magnified image. Where is the object located?

In a single-slit Fraunhofer diffraction pattern, the first minimum occurs at angle θ. At what angle does the second minimum occur?

A plano-convex lens (n = 1.5) has radius of curvature R for the curved surface. What is its focal length?

Two coherent sources of light have a phase difference of π/2 radians. What is the nature of interference at their meeting point?

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?

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

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)

A light ray travels from medium A (refractive index 1.5) to medium B (refractive index 1.0). If the angle of incidence is 30°, what is the angle of refraction?

In Young's double slit experiment, if the distance between slits is doubled while keeping wavelength constant, the fringe width will: