Question

( 6 ) An object is placed at a distance of 40 cm in a front of a plane
mirror. What will be the distance between object and its image ?
A. 40 cm B. 20 cm C. 60 cm D. 80 cm
( 7 ) An object is placed at a distance of 20 cm in a front of a plane
mirror. What will be the distance of the image from the mirror
behind the mirror ?
A. 20 cm B. 40 cm C. 10 cm D. cannot say about the distance
( 8 ) How many images will be formed when two mirrors are arranged
at 60° and object is placed between them?
A. 2 B. 3 C.4 D.5
(9) What is angle between three mirrors in the kaleidoscope ?
A. 90° B. 60° C. 45° D. 30°
2.​

Answer 1

Answer:

B

A

D

C

hope it may help you

Answer 2

Answer:

6.Object is at 40cm distance which means it is at centre of curvature. hence, image will be formed of same size and at centre focus only but real and inverted.

7. Initially, the object is placed 20 cm in front of mirror. So the image will form 20 cm behind the mirror. distance between mirror and image = 18 cm, which is 2 cm less than the initial case.

8.. 45 degeree=360/45 = 8-1=7 images. 60 degeree=360/60 = 6-1=5 images.

9. I don't know

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