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Nuclear Force

Photoelectron...

Question

Photoelectrons are liberated by ultraviolet light of wavelength 3000from a metallic surface for which the photoelectric threshold is 4000. The de-broglie wavelength of electron emitted with maximum kinetic energy is

A

1.2×10^-9 m

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B

5.49×10^-25m

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C

7.28×10^-7m

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D

1.65×10^-19m

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Solution

The correct option is A
1.2×10^-9 m

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Q. Photoelectrons are liberated by ultraviolet light of wavelength

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Q. When photons of energy 5 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy

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