Description: 當光或其他電磁輻射照射到材料上時，電子會根據材料和光的頻率不同，以不同能量被發射出來：這就是光電效應。這個現象可以通過把光看作稱為光子的粒子或能量包來解釋。對於材料（主要是金屬）來說，光的頻率應大於閾值頻率（材料的特性），才會發生這些光電子的發射。它們的最大能量由頻率決定；提高光的頻率會增加電子的最大動能。增加單色光的強度會釋放出更多的電子，但電子的最大動能卻不會變化。這是因為光的強度與光子的數量成正比。

Related Terms:

• 電子

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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