As per 2nd photoelectric experiment, photoelectric effect does not occur if the frequency of the incident light is?
Answer: Below the threshold frequency
Explanation
The photoelectric effect does not occur if the frequency of the incident light is below the threshold frequency.
The threshold frequency is the minimum frequency required for the incident photons to have enough energy to eject electrons from the surface of the material.
If the frequency is below this value, no electrons are emitted, regardless of the light intensity.
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