Related Words

Consent to Adopt or Consent to Adoption: Legal permission for the adoption to proceed.

Photo-Resistor: Photoelectric cell which varies in its electrical resistance according to the light received.

Photo-Reportage: Use of photographs in newspapers and magazines, to supplement or replace written journalistic accounts.

Photo-Etching: Technique of contact printing an image on lith film on a presensitized zinc plate which is then processed and chemically etched to give a relief image.

Photo-Engraving: Production of a relief printing surface by chemical or mechanical means, with the aid of photography.

Photo-Silkscreening: Method of silkscreening images, using a stencil produced photographically.

Photo-Transistor: Light sensitive electronic component which functions as a switch. Used for slave firing of electronic flash heads.

Photoelectron: An electron ejected from an atom or molecule that has absorbed a photon.

Photoelectric Effect: Ejection of electrons from an atom or molecule that has absorbed a photon of sufficient energy. The photoelectric effect is the operating principle behind 'electric eyes'; it is experimental . . . View Full Definition

Photochemistry: The study of chemical changes caused by light. For example, many of the key reactions that generate smog are photochemical.