The threshold wavelength for photoelectr...

The threshold wavelength for photoelectric emission for a material is `5200 A^(@)`. Will the photoelectrons be emitted when this material is illuminated with monochromatic radiation from 1 watt ultra violet lamp?

50 watt infrared lamp

1 watt infrared lamp

50 watt ultraviolent lamp

1 watt ultraviolent lamp

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The correct Answer is:

C, D

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