NEET 2011 Physics question

Photoelectric emission occurs only when the incident light has more than a certain minimum :

(1)power
(2)wavelength
(3)intensity
(4)frequencyCorrect

Answer: (4)

Solution

By Einstein's photoelectric equation , electrons are emitted only if , the threshold frequency of the metal. Emission therefore depends on the frequency (not on the

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Question ID VK-090925