In order to produce photoelectrons, light is needed as the source of radiation.

光电子的产生是需要有光作为辐射源.

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Of a source of radiation. Ratio of the radiant flux ( power ) emitted to the power consumed.

辐射源发射的辐射通量 ( 功率 ) 与消耗功率之比.

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The effect has to do with the source of radiation of the body It'strikes.

微波辐射源和辐射接管体共同决定了微波产生的影响.

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Computer keyboards are also a major source of radiation, perhaps you did not know.

也许你还不知道,电脑键盘也是主要的辐射源.

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