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Work function
Minimum energy required by an e to escape from the metal surface.
Photons and properties
Packets of energy which travel in st. Line with speed of light in vacuum.
1.same speed of light
2.velocity diff in different media
3.rest masa of a photon is zero.
4.photons electrically neutral
5.energy
Why alkali metals preffered for photoelectric emission.
Alkali metals bcuz. They have low work function.
Photoelectric effect
Phenomena of emission of e from surface of metals when radiations of suitable frequency fall on them.
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