You are looking at the image of a pencil in a mirror, as shown in Figure Q18.5 . a. Wh...

You are looking at the image of a pencil in a mirror, as shown in Figure Q18.5 .

a. What happens to the image you see if the top half of the mirror, down to the midpoint, is covered with a piece of cardboard? Explain.

b. What happens to the image you see if the bottom half of the mirror is covered with a piece of cardboard?