Degas and the Impressionists were interested in painting the effects of light, and how the human eye sees subjects.

VOA: special.2009.07.12

The first sign of trouble was a tiny burst of light in the western sky over the United States.

VOA: special.2009.07.22

Nothing happened when they turned on the light in cells in an area of the brain called the subthalamic nucleus.

VOA: special.2009.04.07

Things cannot be as bad as they seem." He stood over the body of his wife in the disappearing light.

VOA: special.2009.10.31

They turn and face death at the hands of a mob like Joe Christmas does in the novel, "Light in August."

VOA: special.2010.01.10

In "Woman and Child Driving" she masters the effect of outdoor light and draws attention to a child's glowing face.

VOA: special.2009.07.12

Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.

VOA: special.2010.01.26

He was famous for painting flowers,buildings and the natural environment in a way that explored color and the changing effects of light.

VOA: special.2010.03.24

They used light-sensitive molecules to turn on and off nerve cells in the deep brain structure of mice.

VOA: special.2009.04.07

This is why there are white and light colored buildings in many warm areas of the world.

VOA: special.2009.06.19

The Doppler effect explains changes in the length of light waves or sound waves as they move toward you or away from you.

VOA: special.2009.04.29

He began experimenting with light-emitting diodes, LEDs,at his laboratory at the University of Calgary in Alberta.

VOA: special.2009.12.21

I'm a lady." Some of the people Faulkner creates, like Reverend Hightower in "Light in August,"

VOA: special.2010.01.10

When they used the telescope to create images of the planet, they found an area that appeared dark in light the human eye could see.

VOA: special.2009.08.25