V

Vaporization

Conversion of a solid or liquid into avapor.

Vignetting

The loss of light through an optical element when the entire bundle of light rays does not pass through. Also, an image or picture that shades off gradually into the background.

Visible radiation (light)

Electromagnetic radiation that can be detected by the human eye. Commonly used to describe wavelengths that lie in the range between 400nm and 700 to 780 nm.