How does frequency affect current in photoelectric effect?
We see in photoelectric effect by increasing frequency the K.E of photoelectrons increases. If velocity of electrons increases then time will be less then current should increase then why current remains constant.?
Will any frequency of light cause the photoelectric effect?
The Photoelectric Effect Sometimes electrons are emitted. Predictions of the wave theory of light: Light of any frequency will cause electrons to be emitted. The more intense the light the more kinetic energy the emitted electrons will have.
What affects current in photoelectric effect?
In the photoelectric effect, light incident on the surface of a metal causes electrons to be ejected. The intensity affects the number of electrons, and the frequency affects the kinetic energy of the emitted electrons.
Does photoelectric current increase with frequency?
Since the current is proportional to the average velocity of the electrons, the current will increase if the average velocity of the electrons is greater. Therefore, if we increase the frequency of the incident light, the photoelectric current will increase.
How does changing the frequency of light affect the current?
Current is determined by light intensity and voltage. One photon will only eject one electron, so increasing the frequency makes no difference.
Does increasing frequency increase current photoelectric?
Based on the wave model of light, physicists predicted that increasing light amplitude would increase the kinetic energy of emitted photoelectrons, while increasing the frequency would increase measured current.
How does the frequency of light affect the color of an object?
Color is determined first by frequency. As the frequency is increased, the perceived color gradually changes from red to orange to yellow to green to blue to violet. The eye doesn’t perceive violet so well. It always seems to look dark compared to other sources at equal intensity.
Why photoelectric current is independent of the frequency of the light that?
Originally Answered: Why is photoelectric current independent of frequency? Because frequency doesn’t determine the number of electrons emitted. Magnitude of the photoelectric current is determined by the numbers of electrons emitted per unit area and not energy of the emitted electrons.
Does increasing frequency increases photoelectric current?
What is the photoelectric effect of light?
Electrons are emitted from the surface almost instantaneously, even at low light intensities. When a photoelectric effect is observed, the number of electrons ejected is proportional to the intensity of the incident light. The maximum kinetic energy of the photoelectrons increases with higher frequency light.
What is the effect of light intensity on current?
If the frequency of electromagnetic waves is higher than the extraction threshold of the metal and electrons are emitted from the metal surface, then an increase of light intensity will result in a proportional increase of electrical current of the electrical circuit where the emitted electrons are conveyed.
What is the relationship between threshold frequency and photoelectric current?
The threshold frequency varies with material, it is different for different materials. The photoelectric current is directly proportional to the light intensity. The kinetic energy of the photoelectrons is directly proportional to the light frequency.
How does the kinetic energy of a photoelectron change with frequency?
The maximum kinetic energy of the photoelectrons is found to increase with the increase in the frequency of incident light, provided the frequency (γ > γ Th) exceeds the threshold limit. The maximum kinetic energy is independent of the intensity of light.