Polarizing windows, filters, etc. are often used to reduce the
amount of light that enters the lens of a camera or into a room or
a car. A library atrium has an overhead skylight that lets in too
much light during the day which heats up the interior of the
library far too much. The building engineer installs new double
paned polarizing sky lights to reduce the intensity. If sunlight,
which is unpolarized, has an average intensity of 1322
W/m2 what angle should the polarizing axis of the second
pane of the window make with the polarizing axis of the first pane
of the window in order to reduce the intensity of the sunlight to
29% of the original value?
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