Like
a rainbow at night, a beautiful moonbow shines above the western horizon in
this deserted beach scene from Molokai Island, Hawaii, USA, planet Earth.
Captured last June 17 in early morning hours, the lights along the horizon are
from Honolulu and cities on the island of Oahu some 30 miles away. So where was
the Moon? A rainbow is produced by sunlight internally reflected in rain drops
from the direction opposite the Sun back toward the observer. As the light
passes from air to water and back to air again, longer wavelengths are
refracted (bent) less than shorter ones resulting in the separation of colors.
And so the moonbow is produced as raindrops reflect moonlight from the
direction opposite the Moon. That puts the Moon directly behind the
photographer, still low and rising over the eastern horizon, a few days past
its full phase.
هیچ نظری موجود نیست:
ارسال یک نظر