夜光表的镭辐射到底有多大？ - 知乎
Edward Russak · University at Buffalo, The State University of New YorkI believe Ra-226 has a specific activity of 1 Ci/gm, which would be about 10 E10 Bq/Kg if my math is correct. Hard to imagine the
Lucien Lee mark this message contains misinformation
｜originally written by Lucien Lee
常見的螢光材料所發出的螢光都是非放射性光，對人體不會造成有害輻射。
而部分高檔手錶里的氚氣和β燈裡面使用的氚、黃磷與硫化鋅的混合物，雖會有放射性的物質。但氚的β衰變只會放出高速移動的電子，穿透能力很弱，連薄薄的有機玻璃片都無法通過，更別說穿透人體。
而部分高檔手錶里的氚氣和β燈裡面使用的氚、黃磷與硫化鋅的混合物，雖會有放射性的物質。但氚的β衰變只會放出高速移動的電子，穿透能力很弱，連薄薄的有機玻璃片都無法通過，更別說穿透人體。
References
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