Physics - Modern Physics Question with Solution | TestHub
The number of photoelectrons emitted for light of frequency (higher than the threshold frequency is proportional to
Options:
Answer:
Solution:
According to the laws of photoelectric effect, the number of photoelectrons emitted per second from a metallic surface is directly proportional to the intensity of the incident light, provided the frequency of the incident light is greater than the threshold frequency.
The intensity of light corresponds to the number of photons striking the surface per unit area per unit time. An increase in intensity increases the number of incident photons, which in turn increases the number of emitted photoelectrons.
The frequency of the incident light affects the maximum kinetic energy of the emitted photoelectrons, not their number.
Therefore, the number of photoelectrons emitted is proportional to the intensity of light.
Answer: intensity of light (I)
