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Only transverse waves can be “sorted” using
polarizers
Polarizers only allow waves vibrating in the
direction of their openings to get through
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Reduction of glare
Concentrating radio signals
Chemistry, geology, navigation, etc.
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Your eyes see 3D because they are spaced apart
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Each eye sees a slightly different image
Your brain interprets how the images go together
3D movies involve two slightly different views
of the movie shown at once
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Polarized 3D lenses allow each eye to only see one of
the views
Your brain then puts together what the eyes are
seeing
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Instead of using polarized lenses, a red and a
cyan lens can be used to see a moving in 3D
The two different views of the movie that are shown
simultaneously are colored red and cyan
 Each lens filters out one of the views, so each eye
only sees one of the views
 Then your brain does the rest of the work.
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Curved mirror can change the size of an image
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Concave mirrors make images smaller or larger
Convex mirrors make images smaller (security
mirrors)
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Concave mirrors can
produce images in front
of the mirror
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All of the light converges
at points in front of the
mirror causing the image
to form there
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flexible, transparent fiber made of a pure
glass not much thicker than a human hair
Light gets “trapped” inside of the fibers
because of total internal reflection.
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The light bounces off the sides of the fiber at
angles larger than the critical angles causing it
to stay inside the fiber