A tree and the sun as a backlight.
backlight definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
transitive verb backlit or backlighted, backlighting
to light, or illuminate, from the rear or from the side away from the camera or the viewer
light or illumination from behind the person or thing being viewed
backlight definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A type of spotlight, used in photography, that illuminates a subject from behind.transitive verb back·light·ed or back·lit , back·light·ing, back·lights
To light from behind: The photographer backlit the subject for a dramatic effect.