JEE Physics - MCQ Practice Questions

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)?

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?

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?

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 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:

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

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:

The resolving power of a telescope is inversely proportional to:

Two coherent sources emit light of wavelength λ. If path difference is 2.5λ, the interference will be:

A convex lens of focal length 30 cm is used as a magnifying glass. For maximum magnification, the object should be placed: