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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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