A photo sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase?
A. The voltage applied to the light source
B. Intensity of light
C. The wavelength of light
D. The frequency of light
Answer:D
A photo sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase?
A. The voltage applied to the light source B. Intensity of light C. The wavelength of light D. The frequency of light