Ray Optics · Refraction
Consider an equilateral prism (refractive index ). A ray of light is incident on its one surface at a certain angle . If the emergent ray is found to graze along the other surface then the angle of refraction at the incident surface is close to .
- (1)
- (2)
- (3)
- (4)
Video solution coming soon
We're animating every PYQ step by step. Subscribe to get them first.
See the full 22 Jan 2026, Shift 1 paper
More on Refraction
- 21 Jan 2026, Shift 1 · Q21A collimated beam of light of diameter 2 mm is propagating along x-axis. The beam is required to be expanded in a collimated beam of…
- 21 Jan 2026, Shift 2 · Q20As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface.…
- 22 Jan 2026, Shift 1 · Q14A thin convex lens of focal length 5 cm and a thin concave lens of focal length 4 cm are combined together (without any gap) and this…
- 22 Jan 2026, Shift 1 · Q23A parallel beam of light travelling in air (refractive index 1.0) is incident on a convex spherical glass surface of radius of curvature…