Of or relating to the electric effects of electromagnetic radiation, especially the ejection of an electron from a surface by a photon.

(physics) The emission of electrons from the surface of a material following the absorption of electromagnetic radiation.

(photography) A lamp that emits a brief flash of bright light; used to take photographs in a dark environment / (photography) A flashbulb

(uncountable) An intaglio process for printing photographic reproductions in newspapers and books. / (countable) A print so made.

To print by this process.

(photography) A photograph taken using a microscope.

(transitive) To photograph through a microscope.

(biology) The movement of an organism either towards or away from a source of light

A form of journalism in which a story is told primarily through photographs and other images

(transitive) to make something photosensitive