Question

Boojho planned activity to observe an object A through pipes as shown in Fig., so that he could see objects which he could not directly see. (a) How many mirrors should he use to see the objects? (b) Indicate the positions of the mirrors in the figure. (c) What must be the angle with respect to the incident light at which he should place the mirrors? (d) Indicate the direction of the rays in the figure. (e) If any of the mirrors are removed, will he be able to see the objects?

Answer 1

a) Totally three mirrors should Boojho should use to see the objects.

b) The mirrors should be placed so that each mirror faces the other, as shown in the figure.

c)

1. The mirrors should be placed at ${45}^{°}$with respect to the light incident on the mirror, as shown in the figure.
2. The angle between the mirror and the incident light should be ${45}^{°}$ because the light will reflect in a straight line.

d)

Arrows indicate the direction of the rays in the figure.

e)

1. If any of the mirrors are removed, he can’t be able to see the objects because the light from the object should be reflected by the consecutive mirrors present.
2. If one of the mirrors is removed, the reflection will not occur. Hence, we can’t see the object.