What is the effect of intensity and frequency on photoelectric current?
For a given emitter and p.d. across the photoelectric cell, the photoelectric current is directly proportional to the intensity of the incident radiation, provided the incident frequency is greater than or equal to the threshold frequency for the emitter material.
What happens to photoelectric current when intensity is doubled?
In a photoelectric experiment, if both the intensity and frequency of the incident light are doubled, then the saturation photoelectric current. Therefore, the saturation photoelectric current becomes doubled, when both intensity and frequency of the incident light are doubled.
What happens to the kinetic energy of photoelectrons when intensity of light is increased?
Answer: If the intensity of the incident radiation is increased, there is no effect on the kinetic energies of the photoelectrons. The kinetic energy depends only on the frequency on the light, and hence the energy provided by each photon.
What is the effect of intensity on the photoelectric current?
In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged.
What is the effect of frequency on photoelectric effect?
An increase in frequency of the incident light increases the kinetic energy of the emitted electrons, so greater retarding potential is required to stop them completely.
What happens to intensity if frequency is doubled?
The maximum kinetic energy of the photoelectrons is double. Since frequency of light solurce is double, the energy carried by each photon will be doubled. Hence intensity will be doubled even if number of photons remains constant. Since frequency is doubled, maximum KE increases but it is not doubled.
What happens when the intensity and frequency of light incident on a photoelectric surface is doubled?
The velocity of the most energetic electrons emitted from a metal surface is doubled, when the frequency ν of incident radiation is doubled.
What is the effect of intensity of incident radiation?
To study the effect of frequency on the photoelectric effect, the intensity of incident radiation is adjusted in such a way that the saturation current is the same each time. It is observed that for increasing frequency the stopping potentials also tend to increase.
What is the relation between kinetic energy and frequency of the photoelectrons?
the kinetic energy of the electrons is linearly proportional to the frequency of the incident radiation above a threshold value of ν0 (no current is observed below ν0), and the kinetic energy is independent of the intensity of the radiation.