Which of the following results is not true about the photoelectric effect?
- AThe electrons are ejected from the metal surface as soon as the beam of light strikes the surface.
- BThe number of electrons ejected is proportional to the intensity or brightness of light.
- CThere is a time lag between the striking of the light beam and the ejection of electrons from the metal surface.
- DFor each metal,there is a characteristic minimum frequency below which the photoelectric effect is not observed.
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