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Why it is the frequency and not the intensity of light source that determines whether emission of photoelectrons will occur or not ? Explain.

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Why it is the frequency and not the intensity of light source that determines whether emission of photoelectrons will occur or not ? Explain.

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Photoelectron depends on frequency to kick start with but intensity is what gives it a magnitude and frequency also has a role deciding the speed with which the electrons eject out.

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