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当光线进入光电阴极的光电倍增管，光电子从阴极发出。
When light enters the photocathode of a photomultiplier tube, photoelectrons are emitted from the photocathode.
youdao
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当光线进入光电阴极的光电倍增管，光电子从阴极发出。
When light enters the photocathode of a photomultiplier tube, photoelectrons are emitted from the photocathode.
youdao