Light reflection and refraction Worksheet-24

Light reflection and refraction Worksheet-24

 

  1. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

A. between the focus and centre of curvature

B. at the centre of curvature

C. beyond the centre of curvature

D. between the pole of the mirror and focus

 

  1. Where should an object be placed in front of a convex lens to get a real image of the size of the object

A. At the principal focus of the lens

B. At twice the focal length

C. At infinity

D. Between the optical centre of the lens and its principal focus

 

  1. A spherical mirror and a thin spherical lens have each a focal length of –15 cm. The mirror and lens are likely to be

A. Both are concave

B. Both are convex

C. The mirror is concave, but the lens is convex

D. The mirror is convex, but the lens is concave

 

  1. No matter how far you stand from a spherical mirror, your image appears erect. The mirror is likely to be

A. plane                                          B. concave

C. convex                                        D. either plane or convex

 

  1. To form a real image, the mirror required is

A. convex                                        B. concave

C. convex or concave                   D. cannot say

 

  1. To form a virtual image, we may use

A. only convex mirror

B. only concave mirror

C. either convex or concave mirror

D. cannot say

 

  1. To obtain magnified, inverted image in a concave mirror, object should be held

A. at pole                                        B. at focus

C. beyond 2 F                                D. between F and 2 F

 

  1. To obtain magnified erect image in a concave mirror, object should be held

A. at pole

B. at focus

C. between pole and focus

D. beyond twice the focal distance

 

  1. Which mirror cannot form a magnified image

A. convex mirror

B. concave mirror

C. both convex and concave mirrors

D. cannot say

 

  1. The angle of incidence of a ray passing through centre of curvature of a spherical mirror is

A. 0°                             B. 90°                 C. 45°                 D. 180°

 

Answer Key:

  1. D
  2. B
  3. A
  4. A
  5. B
  6. C
  7. D
  8. C
  9. A
  10. A