Light – Reflection and Refraction MCQ Quiz

30 questions

1. The image formed by a plane mirror is

   1. real and inverted
   2. virtual and erect
   3. real and erect
   4. virtual and inverted

2. A concave mirror is also called a

   1. diverging mirror
   2. converging mirror
   3. plane mirror
   4. prism

3. A convex mirror always forms an image that is

   1. real, magnified
   2. virtual, diminished
   3. real, inverted
   4. virtual, magnified

4. The mirror used as a vehicle rear-view mirror is

   1. concave
   2. convex
   3. plane
   4. cylindrical

5. Focal length is related to radius of curvature as

   1. f = R
   2. f = R/2
   3. f = 2R
   4. f = R²

6. The mirror formula is

   1. 1/v−1/u=1/f
   2. 1/v+1/u=1/f
   3. v+u=f
   4. v−u=f

7. Magnification for a mirror is

   1. m=v/u
   2. m=−v/u
   3. m=u/v
   4. m=vu

8. A dentist uses which mirror to see teeth enlarged?

   1. convex
   2. concave
   3. plane
   4. cylindrical

9. Bending of light as it passes between media is

   1. reflection
   2. refraction
   3. dispersion
   4. scattering

10. Snell's law relates the sines of the angles of incidence and

    1. reflection
    2. refraction
    3. deviation
    4. dispersion

11. Light entering a denser medium bends

    1. away from normal
    2. towards the normal
    3. along the surface
    4. back

12. Refractive index of a medium n =

    1. v/c
    2. c/v
    3. c×v
    4. c−v

13. The refractive index of diamond is

    1. 1.33
    2. 1.52
    3. 2.42
    4. 1.0003

14. The lens formula is

    1. 1/v+1/u=1/f
    2. 1/v−1/u=1/f
    3. v−u=f
    4. u−v=f

15. Magnification for a lens is

    1. m=−v/u
    2. m=v/u
    3. m=u/v
    4. m=uv

16. The power of a lens is

    1. P=f
    2. P=1/f (f in m)
    3. P=f²
    4. P=1/f²

17. The SI unit of power of a lens is the

    1. watt
    2. dioptre
    3. metre
    4. lux

18. A convex lens has power that is

    1. negative
    2. positive
    3. zero
    4. infinite

19. A concave lens always forms an image that is

    1. real, inverted
    2. virtual, erect, diminished
    3. real, magnified
    4. virtual, magnified

20. A ray through the optical centre of a lens

    1. bends towards axis
    2. passes undeviated
    3. reflects back
    4. disperses

21. Assertion: A convex lens can form both real and virtual images. Reason: The image depends on the object's position.

    1. Both true, R explains A
    2. Both true, R not explanation
    3. A true, R false
    4. A false, R true

22. A concave mirror of focal length 15 cm has radius of curvature

    1. 7.5 cm
    2. 15 cm
    3. 30 cm
    4. 45 cm

23. If a lens has focal length 50 cm, its power is

    1. #ERROR!
    2. #ERROR!
    3. #ERROR!
    4. #ERROR!

24. The speed of light is maximum in

    1. glass
    2. water
    3. vacuum
    4. diamond

25. When object is at 2F of a convex lens, image is

    1. at F
    2. at 2F, same size, real
    3. at infinity
    4. virtual

26. A real image can be

    1. only formed by plane mirror
    2. caught on a screen
    3. always erect
    4. virtual

27. A ray parallel to the principal axis of a concave mirror after reflection

    1. passes through focus
    2. passes through pole
    3. goes parallel
    4. retraces path

28. Object placed between pole and focus of a concave mirror gives image that is

    1. real, inverted
    2. virtual, erect, magnified
    3. at focus
    4. diminished

29. Lateral displacement occurs when light passes through a

    1. prism
    2. rectangular glass slab
    3. concave lens
    4. convex mirror

30. The magnification of a plane mirror is

    1. 1
    2. −1
    3. 0
    4. 2

More Class 10 Science quizzes