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Something weird happens when you look at this bug in a mirror
Something weird happens when you look at this bug in a mirror
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Sous-titres (28)
0:00
this Beetle has a very special trick its
0:02
shell only reflects circularly polarized
0:05
light and only in One Direction when we
0:08
flip that polarized light in a mirror we
0:10
see the opposite so what's happening in
0:13
circularly polarized light the electric
0:15
field components wiggle out of phase
0:17
with each other and added together they
0:18
make a twisty shape as the light wave
0:20
propagates either to the right or to the
0:23
left this beetle is one of the few
0:25
animals on Earth that reflects this
0:26
twisty light so when we look at it
0:28
through a filter that only lets
0:30
left-handed light through we can see all
0:32
the bright colors but when we look at it
0:34
through a filter that only lets
0:35
right-handed light through it looks all
0:37
boring and brown because that colored
0:39
light is polarized only in the left-hand
0:41
Direction not in the right-and direction
0:44
scientists have known about this trick
0:45
for over 100 years but just recently
0:47
figured out that the Beatles can see
0:49
left polarized light and many of their
0:51
predators can't so it could be a way to
0:53
see each other while hiding pretty
0:55
bright idea
