JEE Physics - MCQ Practice Questions

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:

Which of the following represents the correct relationship for the critical angle θc for total internal reflection?

An object is placed 15 cm in front of a concave mirror with focal length 10 cm. The magnification of the image formed is:

In a single slit diffraction pattern, the first minima on either side of the central maximum occur at angular positions where the path difference is:

A lens has power +5 D. A second lens of power -2 D is placed in contact with it. The equivalent focal length of the combination is:

A monochromatic light source produces a diffraction pattern using a diffraction grating. If the wavelength is decreased, the diffraction angle for the first order maximum will:

An air bubble of radius 2 mm is formed in water (refractive index 1.33). The critical angle for light traveling from water to air is approximately:

In a compound microscope, the objective has focal length 0.5 cm and eyepiece has focal length 5 cm. If the least distance of distinct vision is 25 cm, the magnifying power is:

When unpolarized light of intensity I₀ passes through two polarizers whose transmission axes are at 60° to each other, the final intensity is:

The refractive index of a material is found to be 1.5. The speed of light in this material is:

In a fiber optics cable, light undergoes total internal reflection. The minimum refractive index of the core material needed to guide light from air is:

An object is at a distance of 20 cm from a convex lens of focal length 15 cm. The nature of the image formed is:

Coherent light from a laser (λ = 632.8 nm) is used in Young's double slit experiment. The distance between slits is 0.5 mm and screen distance is 1 m. The fringe width is:

When light passes through a glass slab of thickness t and refractive index n, the lateral displacement is maximum when the angle of incidence is:

The equivalent focal length of two lenses in contact is 10 cm. If the focal lengths are 15 cm and f₂, then f₂ is:

An astronomical telescope in normal adjustment has objective focal length 100 cm and eyepiece focal length 5 cm. The magnifying power is:

In Brewster's angle incidence, the reflected and refracted rays are:

A thin air gap of thickness d is created between two glass plates. For constructive interference in reflected light with wavelength λ, the condition is:

The resolving power of a telescope is inversely proportional to: