JEE Physics - MCQ Practice Questions

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?

An object is placed at distance u from a convex lens of focal length f. If the magnification is -2, what is the relationship between u and f?

In Young's double-slit experiment with slit separation d = 1 mm and distance to screen D = 1 m, if the 5th bright fringe is at 2.5 mm from the center, what is the wavelength of light?

A ray undergoes total internal reflection at a critical angle θc. If the refractive index of the denser medium is √2, what is θc?

A concave lens of focal length -20 cm is used to form an image of an object placed 10 cm from it. What is the nature of the image?

In a Newton's rings experiment, the diameter of the 10th dark ring is 0.5 cm. What is the diameter of the 5th dark ring?

A ray of light is incident on a glass slab at 60°. If the refractive index of glass is √3, what is the angle of refraction?

A prism has apex angle A = 60° and refractive index n = √3. What is the minimum angle of deviation?

An object moves towards a concave mirror of focal length 15 cm. Initially at 30 cm, it moves to 20 cm. How does the magnification change?

In an optical fiber, light undergoes total internal reflection. If the core has n = 1.5 and cladding has n = 1.48, what is the critical angle inside the core?

A lens combination has two lenses with powers P₁ = +10 D and P₂ = +5 D placed in contact. What is the focal length of the combination?

In Fraunhofer diffraction by a single slit, if the slit width is doubled, how does the angular width of the central maximum change?

Two slits of widths w₁ and w₂ produce a diffraction pattern with intensity ratio I₁:I₂ = 4:1. What is the ratio of their widths?

A biconvex lens (n = 1.5) has both radii of curvature equal to 20 cm. What is its focal length?

In a double-slit experiment, if one slit is covered with a transparent film of thickness t and refractive index n, the central bright fringe shifts. What is the path difference introduced?

A monochromatic light source of wavelength λ is incident on a diffraction grating with 500 lines/mm. The second-order maximum is at 30°. What is the wavelength?

A parallel beam of light undergoes diffraction through a circular aperture of diameter D. The radius of the first dark ring in Fraunhofer diffraction is proportional to: