Multiple Reflection

Q.

The number of images formed by the combination of two mirrors is $9$. What is the angle between the two mirrors?

1. $36°$

2. $40°$

3. $90°$

4. both (a) and (b)

Q. What is a kaleidoscope? Name its working principle and list down some of its uses. [2 Marks]

Q. The number of images formed by two plane mirrors inclined at an angle ${60}^{\circ }$ of an object placed symmetrically between mirrors is

1. 5
2. infinite
3. 7
4. 6

Q.

Two plane mirrors are initially inclined at 30° and they are moved apart by 30° each time, till the angle between them becomes 120°. If an object is placed symmetrically between them then find the sum of all the images formed.

1. 23

2. 20

3. 21

4. 22

Q.

If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:

1. 4

2. 6

3. 5

4. 7

Q. Optical instruments like the periscope and kaleidoscope use the property of ________ in order to create the final image or images.

1. diffractions
2. absorption
3. multiple reflections
4. refractions

Q. Match the number of images formed by two plane mirrors with the corresponding angle between them.

1. 5
2. 2
3. 3
4. 1

Q. If you stand in between two plane mirrors facing each other, how many images would be formed?

1. $2$
2. $1$
3. $50$
4. Infinite