a photon of light from which of the following electromagneti

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/05 23:18:53

a photon of light from which of the following electromagnetic radiations carries the greater amount of energy?
A.blue B.green C.orange D.red E.yellow

a light ray strikes a photovoltatic metal as shown above.which of the following statement is correct if a voltage is introduced into the metal by the light ray?
the light ray is a blue light
the beam is below threshold
the beam does not contain any photons
A.1 B.2 C.1&3 D.2&3 E.1&2&3

光的能量与光的频率成正比,与光的波长成反比,你只要找到谁的波长比较短谁的能量就是最大的
2肯定是错的,如果要打出电子产生电压the beam is above threshold,3 肯定是错的,当然有光子.1得看图,不过按排除法只能选A了
再问：为什么一定有光子
再答：光线当然含有光子啊
再答：光线发射光子，打到金属板上把电子打出来产生电压

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