用盖革—谬勒计数器对日光灯、白炽灯、LED等光源进行测量,发现日光灯发射高能光子,它能穿透包封感光胶片的黑纸。用能谱分析仪测量日光灯发射光子能谱显示,日光灯发射峰值能量为83 keV。因辐射对视网膜神经组织伤害较大,长期使用日光灯时要利用射线在空气中衰减很快的特性,应保持眼睛距日光灯50 cm以外。
The Fluorescent lamp,the incandescent lamp,LED and so on were measured by G-W counter. The result shows the fluorescent lamp can emit high energy photon that can penetrate black paper with it covering photo sensitive film. It is measured by energy spectrometer that the fluorescent lamp emits energy spectrum of photon,which shows that emission peak's energy of the fluorescent lamp is 83 kev. Radiation can hunt nervous tissue of the retina while the fluorescent lamp has been used for a long time,character that the radiation declines sharply in air may be utilized. The distance ought to be beyond 50 cm between the eyes and the fluorescent lamp.