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This is a picture of a Bald Head Island
salt marsh that was taken by a satellite in outer
space. This is a color-infrared image.
It displays light reflected in the infrared region
of the light spectrum. Humans can not see
light in the infrared region, so the amount of
infrared light is shown in red. The more
infrared light an object reflects, the brighter red
it will look in the picture. Green plants
reflect a lot of infrared light. In this picture, green plants look bright red. Water
is black and bare land and sandy beaches
are white. The low marsh is very wet,
so it is darker than the high
marsh. The high marsh is lighter, with bits of
red and green and brown.
Can you find an area of high marsh and click on it
in the map? |
