Suppose a second bulb is added to the left of the one in Figure 33.1, as illustrated in Figure 33.3. What happens to

(a) the brightness of the spot created on the screen by the first bulb and

(b) the brightness at locations close to the vertical edges of the original shadow on the screen (points P, Q, R, and S)?

Transcribed Image Text:

Figure 33.1 A light beam that is not disturbed travels in a straight line. Position of illuminated spot shows that light follows straight line through hole. screen shadow i hole in cardboard