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Q.

The photoelectdc threshold of a certain metal is 3000 Å. If the radiation of 2000 Å is incident on the metal

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a

electrons will be emitted

b

positrons will be emitted

c

protons will be emitted

d

electrons will not be emitted

answer is A.

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Detailed Solution

The photoelectric will be emitted because wavelength o{ incident radiation is less than threshold wavelength λ<λ0
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The photoelectdc threshold of a certain metal is 3000 Å. If the radiation of 2000 Å is incident on the metal