The threshold wavelength for photoelectric emission from a material is 5200 mathringA. Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a

Question

The threshold wavelength for photoelectric emission from a material is 5200 mathringA. Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a (A) 50 W infrared lamp (B) 1 W infrared lamp (C) 50 W ultraviolet lamp (D) 1 W ultraviolet lamp

Tardigrade Admin · Accepted Answer

For photoemission to take place, wavelength of incident light should be less than the threshold wavelength. Wavelength of ultraviolet light < 5200 mathring A while that of infrared radiation > 5200 mathring A.

Q. The threshold wavelength for photoelectric emission from a material is $5200 \overset{˚}{A}$ . Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a

50 W infrared lamp

1 W infrared lamp

50 W ultraviolet lamp

1 W ultraviolet lamp

For photoemission to take place, wavelength of incident light should be less than the threshold wavelength. Wavelength of ultraviolet light $< 5200 \overset{˚}{A}$ while that of infrared radiation $> 5200 \overset{˚}{A} .$

Q. The threshold wavelength for photoelectric emission from a material is 5200A˚. Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a