1: A periscope is an optical instrument made of two plane mirrors inclined at an angle of 45° with respect to the axis of the tube (Figure 10.14). An observer places her

eye at point O. a. Draw the path of a ray of light issued from A.

b. Determine the position and the nature of the image of A given by the two mirror system.


2: Can you think of a system of mirrors that cancels the right-left reversal, i.e., that would allow you to see a text as it is?​