Board Exam Practice — Light and Human Eye

Grade 10 Science — Board Exam Practice — Light and Human Eye: 25 practice questions with instant scoring and explanations.

1. The speed of light in vacuum is:
2. The refractive index of a material is defined as:
3. A convex lens is used to correct:
4. The critical angle for total internal reflection depends on:
5. When light travels from denser to rarer medium, it bends:
6. The power of a lens with focal length 20 cm is:
7. The lens in the human eye is:
8. Myopia (short-sightedness) is caused by:
9. The part of the eye that controls light intensity is:
10. The power of two lenses in contact is:
11. The angle of deviation for a ray passing through a prism is minimum when:
12. The refractive index of glass is approximately:
13. Rainbow is formed due to:
14. The near point of a normal human eye is at:
15. When an object is placed at the center of curvature of a concave mirror, the image is:
16. The focal length of a plane mirror is:
17. A convex mirror always produces:
18. The power of a concave lens is:
19. Presbyopia is due to:
20. The magnification produced by a concave mirror when object is between F and P is:
21. When light enters the eye, it is refracted primarily by the:
22. The blind spot of the eye corresponds to:
23. For a lens, the relationship 1/f = 1/v + 1/u is:
24. A person cannot see objects clearly when placed beyond 1 meter, the person has:
25. The refractive index of water is approximately: