1.

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?A. `50` watt infrared lampB. `1` watt infrared lampC. `50` watt ultraviolet lampD. `1` watt ultraviolet lamp

Answer» Correct Answer - `lambda lt 5200Å`


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