| A | B |
|---|
| photoelectric | of the electric effects produced by light or other radiation |
| photogenic | producing or generating light; appearing attractive in proptographs |
| photokinesis | motion or activity in response to light |
| photolysis | chemical decomposition due to the action of light |
| photometer | an instrument used to measure the intensity of light |
| photon | a quantum of light energy |
| photosynthesis | the process by which green plants use sunlight to produce food |
| phototropism | movement of a part of a plant toward or away from light sources |
| photography | producing images of objects upon a photosensitive surface by the chemical action of light |
| photojournalism | journalism which uses photgraphic rather than written material as the basis of a story |
| photo | light |
