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>>Dual Nature of Radiation and Matter
>>Einstein's Photoelectric Equation : Energy Quantum of Radiation
>> $Threshold wavelength for a metal is 5200$

Question

Threshold wavelength for a metal is 5200 A. The photoelectron will be ejected, if it is irradiated by light from

A

50 W infrared lamp

B

1 W infrared lamp

C

50 W ultraviolet lamp

D

0.5 W infrared lamp

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Correct option is A)

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