Threshold wavelength for photoelectric emission from a metal surface is 5200 Å. Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from.
A. 1 W IR lamp
B. 50 W UV lamp
C. 50 W IR lamp
D. 10 W IR lamp
Answer:B
Threshold wavelength for photoelectric emission from a metal surface is 5200 Å. Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from.
A. 1 W IR lamp B. 50 W UV lamp C. 50 W IR lamp D. 10 W IR lamp