$\because$ Predict/Calculate REFERRING TO EXAMPLE $25-12$ Suppose the incident beam of light is linearly polarized in the same direction $\theta$
as the transmission axis of the analyzer. The transmission axis
of the polarizer remains vertical. (a) What value must $\theta$ have if
the transmitted intensity is to be 0.200$I_{0} ?$ (b) If $\theta$ is increased
from the value found in part (a), does the transmitted intensity
increase, decrease, or stay the same? Explain.