photo-, phot-, -photic

(Greek: light; ultraviolet and infrared radiation; radiant energy)

An intolerance to light; photophobia.
1. Pertaining to the electric effects of light or other radiation.
2. Relating to, or produced by, the electrical effects of light, including the emission of electrons, the generation of a voltage, or a change in resistance.
photoelectric effect
A phenomenon in which electrons are emitted from a material (generally a metal) when it is exposed to light with a given frequency.

The classical concept of light as a continuous wave could not account for this, and it was then explained by Einstein (1905) on the basis that light is a stream of separate particles.

This interpretation, and his subsequent elaboration of it, is said to have formed the basis for much of quantum mechanics.

The electricity produced when light, or other forms of electromagnetic radiation, strike certain materials; such as, cesium, selenium, and silicon.
photoelectrochemical cell
A galvanic cell in which usable current and voltage are simultaneously produced upon absorption of light by at least one of the electrodes.
The study of electrochemical reactions that are affected or promoted by light.
A material that absorbs incident light to produce current through an external circuit.
photoelectrolysis, photoelectrolytic
a process that uses light energy rather than electrical energy to produce a chemical change in an electrolytic solution.
photoelectrolytic (hydrogen) production
A proposed process to produce commercial hydrogen, employing the electrolysis (splitting) of water by means of light energy.
An electron emitted from a metallic surface when the latter is illuminated with light, especially with light of short wavelength.
The ejection of electrons from a material, usually a solid, when it is exposed to electromagnetic radiation.
The process of making a printing plate by photographing an image onto a metal plate and then etching the image.
Erythema (redness of the skin) as a result of the exposure to light.
photoesthesia (s) (noun), photoesthesias (pl)
A reference to, or having, a sensation or perception of light: Dr. Schmidt, the eye surgeon, assured Jackie that she would begin to experience photoesthesia again about three weeks after her eye surgery.
photoesthetic (adjective), more photoesthetic, most photoesthetic
Possessing or pertaining to the sensation elicited by photons (light): The flashing of strobe lights during the theater production caused a photoesthetic feeling of nausea among some of the patrons.

Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; pheno-; phospho-; scinti-, scintill-; splendo-.