The photo-electrons emitted from a surface of sodium metal are such that

They all are of the same frequency

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They have the same kinetic energy

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They have the same de Broglie wavelength

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They have their speeds varying from zero to a certain maximum

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Solution

The correct option is D
They have their speeds varying from zero to a certain maximum

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The number of photo-electrons emitted per second from a metal surface increases when

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