Nature, Speed and Reflection of Light 6 PYQs

• Why is infrared imaging preferred over visible imaging for thermal and surveillance operations?Delhi Police 2026 · 08 Jan 2026
• Which phenomenon provides direct experimental evidence that light waves are transverse in nature?DSSSB 2026 · 01 Oct 2026
• What is the presently accepted value of the speed of light in vacuum?DSSSB 2026 · 03 Oct 2026
• What happens to the wavelength of light when it passes from air into glass?DSSSB 2026 · 08 Oct 2026
• Which type of electromagnetic radiation has the shortest wavelength?DSSSB 2026 · 12 Oct 2026
• According to the law of reflection, the angle of incidence is-DSSSB 2026 · 16 Oct 2026

Spherical Mirrors: Concave and Convex 12 PYQs

• An object of height 1.0 cm is placed 24 cm before a concave mirror of focal length 16 cm. What is the nature and height of the image?SSC Selection Post 2026 · 17 Sep 2026
• Consider the following statements regarding the image formed by a concave mirror when the object is placed between the pole (P) and the principal…SSC Selection Post 2026 · 22 Sep 2026
• At the point of incidence on a spherical mirror, the normal is drawn:Delhi Police 2026 · 21 Jan 2026
• An object is placed 30 cm (centimeter) in front of a thin converging lens whose focal length is 15 cm (centimeter). What is the distance of the…SSC CGL 2026 · 08 Oct 2026
• What is the relationship between the angle of incidence and the angle of reflection?DSSSB 2026 · 21 Sep 2026
• How is the size of the image formed by a plane mirror compared to the object?DSSSB 2026 · 24 Sep 2026
• Which type of mirror provides the widest field of view?DSSSB 2026 · 25 Sep 2026
• What type of mirror is commonly used in torches?DSSSB 2026 · 28 Sep 2026
• Which description correctly identifies the image formed by a plane mirror?DSSSB 2026 · 29 Sep 2026
• Which type of mirror is most suitable for concentrating sunlight to achieve high temperatures in a solar furnace?DSSSB 2026 · 30 Sep 2026
• What happens to a ray of light that passes through the principal focus of a convex lens after refraction?DSSSB 2026 · 11 Oct 2026
• A convex mirror is fitted on a vehicle’s wing. Which combination of properties allows it to serve as an effective rear-view mirror?DSSSB 2026 · 18 Oct 2026

Refraction, Refractive Index and Total Internal Reflection 4 PYQs

• For total internal reflection to occur at the core–cladding boundary in an optical fibre, which condition must be satisfied for a light ray…Delhi Police 2026 · 20 Jan 2026
• Why does a diamond sparkle more than other transparent materials?SSC Selection Post 2026 · 23 Sep 2026
• Which basic physical principle allows light to travel along a curved optical fibre with very little loss?Delhi Police 2026 · 16 Jan 2026
• Which region of the electromagnetic spectrum is most commonly used as the carrier signal in standard optical fibre communication links?Delhi Police 2026 · 20 Jan 2026