| One electron volt is roughly half the energy carried by a single photon of red light. |
| In scintillation counting, a fluorescent material absorbs the energy of the photon and emits a new photon as a flash of light in response. |
| As long as the frequency of the light is greater than the work function of the metal, any photon can eject an electron. |
| Implicitly, the more donors, the greater the probability for a photon to become an exciton. |
| In paralyzable detectors, a photon reaching the detector during the dead-time leads to an elongation of the dead-time period. |
| The ferrioxalate actinometer is a photon counter and is sensitive to wavelengths less than 450 nm. |
