Question

Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?

a. Two mirrors are needed.
b. Three mirrors are needed.
c. Four mirrors are needed.
d. It is not possible to see the back of the head with mirrors.

Answer 1

Using two mirrors positioned at a right angle, you can see the back of your head as the image reflects from one mirror to the other.

Step-by-step explanation:

To see the back of your head using mirrors, the minimum number of mirrors you would need is two. Arrange them at a 90-degree angle relative to one another. When you are positioned at the correct angle relative to where the two mirrors meet, you will be able to see the back of your head reflected in one mirror and then to the other. The phenomenon of multiple images can be demonstrated with two mirrors placed at an angle, as seen in various physics demonstrations and experiments.