Light reflection and refraction Worksheet-3

Light reflection and refraction Worksheet-3

 

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

A. Convex                                       B. concave

C. Convex or concave                  D. cannot say

 

  1. I. A real image is always inverted.

II. A virtual image is always erect.

A. Only I is true                            B. Only II is true

C. Both I and II are true             D. Neither is true

 

  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 P and F                      D. Beyond 2 F

  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°

 

  1. If f is focal length and R is radius of curvature of a spherical mirror, then

A. R = f               B. R = 2f            C. R = 3f            D. R = 4f

 

  1. As per new Cartesian Sign conventions,

A. Focal length of concave mirror is positive and that of convex mirror is negative.

B. Focal length of both, convex and concave mirror is positive.

C. Focal length of both, convex and concave mirror is negative.

D. Focal length of concave mirror is negative and that of convex mirror is positive.

 

  1. The image formed by a concave mirror is real inverted and of same size as that of the object. The position of the object is

A. At C                                            B. At F

C. Between C and F                     D. Beyond C

 

Answer Key:

  1. B

Convex mirror can’t form real image.

  1. C
  2. C

Virtual images can be formed in both convex and concave mirrors.

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