Chapter 10.2, Problem 6P

'Department store dressing rooms often have large mirrors that actually consist of three adjacent mirrors, put together as shown In Flgure 10.54 (as seen looking down from the ceiling). Use the laws of reflection to show how you can stand in such a way as to see the reflection of your back. Make a careful drawing, using an enlarged version of Figure 10.54 , that shows clearly how light reflected off‘ your back can enter your eyes. Your drawing should show where you are standing, the location of your back. and the direction of the gaze of your eyes. (You may wish to experiment with paper folding before you attempt a final drawing. See Practice Exercise 2 .)

 
Figure 10.54 Department store mirror