빛이나 전자기 복사의 양자를 나타내는 입자로, 정지 질량이 0이며 에너지는 진동수에 비례함.
A particle representing a quantum of light or other electromagnetic radiation, carrying energy proportional to its frequency and having zero rest mass.
예문:
"Einstein explained the photoelectric effect by proposing that light consists of discrete photons."
"In quantum field theory, the photon is the force carrier for the electromagnetic force."
"A single photon can be detected by highly sensitive optical equipment."
망막에 도달하는 빛의 세기를 측정하는 단위로, 트롤랜드(troland)라고도 함.
A unit of retinal illuminance, also known as a troland, used to measure the intensity of light reaching the retina.
예문:
"The researcher calculated the retinal illuminance in photons to standardize the visual stimulus."
"One photon is defined as the retinal illuminance produced by a surface of one candela per square meter viewed through a pupil of one square millimeter."