An app can be as simple as a program that turns a mobile phone into a flashlight to light your way at night.

VOA: special.2011.03.22

A special needle is inserted directly into the tumor and light energy is passed through a laser.

VOA: special.2010.11.23

He could turn off a light and then jump into his bed before the room got dark.

VOA: special.2009.01.24

Ultraviolet light from the sun changes a substance in the skin into vitamin D.

VOA: special.2009.04.21

Light waves from an object speeding away from you will stretch into longer wavelengths.

VOA: special.2009.04.29

The moon was shining and its pale light reached into the room.

VOA: special.2009.06.27

Instead, let us come out into the light of day.

VOA: special.2009.04.02

"We use some kind of light oil that we heat up and we actually work it into the oily feathers.

VOA: standard.2010.06.08

"The policeman who ran into them was not only drunk, but had gone through a red light and had no siren on.

VOA: standard.2010.05.19

The experts expect their one-year global probe into secret detention centers to shine more light on the extensiveness of these facilities and how they operate.

VOA: standard.2009.03.21

That golden light represents where she and everyone else moves on to, so the idea is you can put whatever you choose into that golden light.

VOA: standard.2010.01.08

"With reform, we will make our financial system more transparent by bringing the kinds of complex backroom deals that helped trigger this crisis into the light of day."

VOA: standard.2010.05.15

A red light means get into position. Yellow light means ready.

VOA: standard.2009.09.10

But the silicon is what converts light into electricity, so you might think using so much less silicon would reduce the electrical output, but Atwater says that's not the case.

VOA: standard.2010.02.19