Polarizing Filters

When two Polarizing Filters are placed atop one another, they can be transparent or opaque to light. By rotating one of the filters, the transmitted light passing through the filters may be turned "on" or "off". When the filters do not transmit light, the polarizing filters are said to be "crossed polarizers". Certain materials such as cellophane tape, mica, Plexiglas, corn syrup, and stretched polyethylene exhibit beautiful colors when placed between two crossed polarizing filters.

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