| 释义 |
pho·ton AHD[fōʹtŏn'] D.J.[ˈfəʊˌtɒn]K.K.[ˈfoˌtɑn]n.（名词）- The quantum of electromagnetic energy, generally regarded as a discrete particle having zero mass, no electric charge, and an indefinitely long lifetime. See table at subatomic particle 光子，光量子：电磁能的量子，一般认为是有零质量、无电荷和不定长寿命的离散性粒子 参见 subatomic particle
- A unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.光度：视网膜亮度单位，相当于每平方米有一烛光亮度的表面，通过一平方毫米的瞳孔区域，到达视网膜的光线数量
photonʹic adj.（形容词） |