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CBSE Class 11-science Answered

What is photoelectric effect?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
When electromagnetic radiation strikes on the surface of alkali metals, they emit electrons. This is called the photoelectric effect. This occurs as alkali metals have low ionization energies, which allows the electrons to be easily ejected when exposed to light. Among alkali metals, cesium has lowest ionization energy and hence it can show photoelectric effect to the maximum extent.
Answered by | 04 Jun, 2014, 03:23: PM

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