The stopping potential is more negative for higher frequencies of incident radiations . This means that greater the frequency of incident radiations, greater is the maximum kinetic energy of the photo electrons.
Does stopping potential depends on frequency?
The stopping potential does not depend on the intensity nor the number of incident photons but the stopping potential depends on the frequency of the incident light , the higher the frequency of the incident light higher the stopping potential or cut potential. It also depends on the kinetic energy of the electrons.
Stopping potential or the cut-off potential is the minimum value of negative potential at anode which just stops the photo electric current. Threshold frequency is the minimum frequency of light below which photoelectric effect does not take place .
How does the stopping voltage depend on the intensity and frequency of the light?
The stopping voltage depends on the frequency of light incident on the cathode and therefore the maximum kinetic energy received by the electrons also depends on the frequency of the incident light. It is evident that the energy of light is proportional to its frequency.
What are the factors on which stopping potential depends?
The stopping potential depends on the frequency of the incident light and not on the intensity . This is for the photo electric effect. The stopping potential depends on the kinetic energy of the electrons, which will be affected only by the frequency of the incoming light and not by its intensity.
Does stopping potential depends on nature of emitter?
(d) : The stopping potential depends on frequency of incident light and the nature of the emitter material . For a given frequency of incident light, it is independent if its intensity.
Does stopping potential depends on work function?
The stopping potential depends on the kinetic energy of the electrons , which will be affected only by the frequency of the incoming light and not by its intensity. ... The minimum amount of energy that is required to eject an electron from the metal surface is known as the work function.
What is difference between threshold frequency and stopping potential?
Threshold frequency is the minimum frequency of the incident light which can cause the ejection of electrons without giving them additional energy. The amount of potential that is required to stop the electron having the maximum kinetic energy from moving is known as stopping potential.
What is the cutoff for stopping potential?
The Stopping Potential or the Cut-off Potential is the potential difference at which the ejected photoelectrons stop moving across the plates or in other words, The Photoelectric Current between the plates falls to 0. Note: As Stopping Potential counters, the movement of photoelectrons possessing Kinetic Energy.
What is stopping potential formula?
Given: Stopping potential = V s = 2 V , wavelength of incident light = λ = 160 nm = 160 x 10 – 9 m, Threshold wavelength = λ o = 240 nm = 240 x 10 – 9 m, speed of light = c = 3 x 10 8 m/s, Planck’s constant = h = 6.63 x 10 – 34 Js, Charge on electron = e = 1.6 x 10 – 19 C.
What is stopping voltage affected by?
The stopping voltage (or stopping potential) refers to the voltage difference required to stop electrons from moving between plates and creating a current in the photoelectric experiment.
Does stopping voltage change with intensity?
The intensity of the light has no effect on the maximum kinetic energy of the photoelectrons. Therefore, the stopping voltage does not increase .
What does the slope of the line between stopping potential and frequency represent?
What does the slope of the line between stopping potential and frequency represent? ... The slope represents the work function .
How does stopping potential depends on frequency of incident radiation?
The stopping potential is more negative for higher frequencies of incident radiations. This means that greater the frequency of incident radiations, greater is the maximum kinetic energy of the photo electrons . That is why a greater retarding potential is required to stop them completely.
What does work function depend on?
Work functions depend on the structure and chemical composition of a surface . For example, different crystallographic surfaces of the same metal or compound can have substantially different work functions. Chemical modifications of a surface can have even larger consequences.
What does threshold frequency depend on?
The threshold frequency depends on the material being illuminated . 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.
