(physics) The gain (multiplication factor) of a photodetector or photomultiplier

(photography) A colloid, containing light-sensitive material, that is coated onto a length of film for use in predigital photography

Producing light.

photographic glottography

Synonym of cinematographer

Relating to photoglottography.

(parapsychology) spirit photography

(parapsychology) The purported art of taking photographs of the spirits of dead people, other spiritual entities, ectoplasm, auras, and the like; a common practice in the late 19th and early 20th centuries, especially using black-and-white photography and the technique of double exposure.

plural of photogain

Alternative form of femtophotography