Light, striking the water's surface where air and water meet, can break water molecules away and float them into the air, causing evaporation in the absence of any source of heat.

Source: Massachusetts Institute of Technology Summary: At the interface of water and air, light can, in certain conditions, bring about evaporation without the need for heat, according to a new study.

Green light means “go.” That might apply to evaporating water molecules too. Visible light, especially that of a greenish hue, might spur water to evaporate, researchers report in the Nov. 7 ...

In these circumstances, having a salt-water-powered light source can be a big help. You can keep table salt indefinitely as long as it stays dry, so it’s a practical emergency resource to have ...

For a given light source in the air, ... But this says that if the angle of the light in water is at an angle greater than 48.6 degrees, the light doesn't pass into the air at all.

Sewage-contaminated water absorbs certain wavelengths of light, leaving a signature that can be detected by space-based instruments, a new study finds.