Light — Refraction

Grade 10 Science — Light — Refraction: 25 practice questions with instant scoring and explanations.

1. Refraction of light occurs because:
2. Snell's law is expressed as:
3. Refractive index of a medium is:
4. The refractive index of water is approximately:
5. When light travels from water (n=1.33) to air (n=1.00), it:
6. Total internal reflection occurs when light travels from:
7. The critical angle is the angle of incidence for which angle of refraction is:
8. For total internal reflection to occur, the angle of incidence must be:
9. Optical fiber works on the principle of:
10. When a glass slab is placed on paper, the paper appears closer because:
11. Apparent depth formula is:
12. A fish appears at a different position when viewed from outside water due to:
13. If light hits glass slab at 30° to normal with n=1.5, the refracted angle inside glass is:
14. The refractive index of glass is typically:
15. When light emerges from a glass slab, it emerges:
16. Using Snell's law, if θ₁ = 30°, n₁ = 1, n₂ = 1.5, find θ₂:
17. The critical angle for light traveling from glass (n=1.5) to air (n=1) is:
18. Diamonds are brilliant because they:
19. A coin at the bottom of water appears at apparent depth of 1 m. If real depth is 1.33 m and n of water is 1.33, this is:
20. When light enters perpendicular to the glass slab surface, refraction angle is:
21. Prism dispersion occurs because:
22. A ray incident at critical angle emerges at:
23. Which color has highest refractive index?
24. For a glass slab of thickness t and refractive index n, lateral displacement of light ray is:
25. Mirage in deserts occurs due to: