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The photoelectric threshold for a certai...

The photoelectric threshold for a certain metal surface is 3600 Å. If themeal surface is irradiated by a wavelength of 1100 Å, the kinetic energy of the emitted photoelectrons is

A

1.1 eV

B

2 eV

C

2.3 eV

D

7.8 eV

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The correct Answer is:
D
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