Photoelectric EffectHard

Question

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

Options

A.power
B.wavelength
C.intensity
D.frequency

Solution

According to Einstein’s photoelectric equation
    
Since Kmax is positive, the photoelectric emission occurs only if
    
The photoelectric emission occurs only hen the incdent light more than a certain minimum frequency. This minimum frequency is called thershold frequency.

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