Method for the sensitometry of industrial x - ray films for energies up to 3 million electron volts 能量達(dá)3百萬(wàn)電子伏工業(yè)用x射線膠片感光度的測(cè)定方法
Ionizing an atom of hydrogen takes an energy of 13 . 6 electron volts , an amount delivered by a photon of ultraviolet light 游離氫原子需要13 . 6電子伏特,相當(dāng)于一個(gè)紫外光光子所能提供的能量。