Place filters on the stage of the
document
camera, switch to the base light, and adjust the camera aperture.
Show
that one sheet reduces the intensity of the transmitted light, ideally
by
half. Overlay and rotate the second to show how the intensity
varies
with the angle between the polarization axes. Show the effect of
placing
a third polarizer between two crossed polarizers.
NOTES
Use the sheets with arrows marking
the polarization axis.
