Then he begins to notice subtle ways in which his face has been changing since it was last exposed to air and light.

If alien eyes had never been exposed to electric light before, then.

"People also expose art to too much light," she said.

A security thread that will glow red when exposed to ultraviolet light in a dark environment.

Camera film, of course, would be exposed to ordinary visible light.

So could exposing people to bright light to re-set the body's conception of morning.

A15 The human body clock can be reset more simply and quickly than previously thought by exposing a person to bright light, a study says.

After a patient has taken the drug, blood is removed from the body, exposed to ultraviolet light and returned.

Individual water droplets exposed to white light will create a set of colored rings.

Avoid areas where you will be exposed to halogen or fluorescent light.