Chapter 25, Problem 68PCE

Predict Explain Consider the two polarization experiments shown in Figure 25-42 (a) If the incident light is unpolarized, is the transmitted intensity in case A greater than less man or the same as the transmitted intensity in case D? (b) Choose the best explanation from among the following:

1. I.            The transmitted intensity is the same in either case the first polarizer lets through one-half the incident intensity, and the second polarizer is at an angle θ relative to the first.
2. II.            Case A has a smaller transmitted intensity than case B because the first polarizer is at an angle θ relative to the incident beam.
3. III.            Case B has a smaller transmitted intensity than case A because the direction of polarization is rotated by an angle θ in the clockwise direction in case B.

Figure 25-42

Problems 68 and 69