英文：A measure of the induced voltage in a circuit caused by a magnetic flux and equal to the flux times the number of turns in the coil that surrounds it.
中文：碰撞，匝鍊電路中由于磁通量而造成電伏減少的單位，等于穿過一載流線圈的磁通量與線圈匝數之積
英文：The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.
中文：發光效率一定波長的光量對同樣波長的輻射光量的比例
英文：An instrument for measuring a property of light, especially luminous intensity or flux.
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