Earth Science Photo of the Day.7/11/11

Photographer: David Kiefer 
Summary Author: David Kiefer; Jim Foster

The photo above shows the opposition effect (lower center) against a background of striking fall foliage over eastern Tennessee. The apparent brightening of the landscape near the observer's shadow (at the antisolar point) is called the "opposition effect." It can be observed on just about all landscapes, but not on water, and results from the absence of shadows coming from the antisolar point. The shadow of the helicopter, used to take the photo, can be seen but the area surrounding this shadow is bright since the shadows of the trees can't be detected. Photo taken on October 15, 2011.


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