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The photoelectric threshold wavelength of a certain metal is 3000 $\overset{0}{A}$ . If the radiations of 2000 $\overset{0}{A}$ is incident on the metal

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Protons will be emitted

Electrons will be emitted

Positrons will be emitted

Electrons will not be emitted

answer is B.

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Detailed Solution

As the wavelength of the incident radiation is less than threshold wavelength photoelectron will be emitted.

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