What does the slope of 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.
What is the relation between stopping potential and frequency?
For a given intensity of radiation, the stopping potential depends on the frequency. Higher the frequency of incident light higher the value of stopping potential.
What is the slope of frequency of incident light and stopping potential for a given metal surface?
The stopping potential (v0) varies linearly with the frequency (v)of the incident radiation for a given photosensitive surface with the slope remaining the same for different surface . Given reason. Stopping potential is zero for any frequency of incident light.
What is the significance of stopping potential frequency graph?
The stopping potential Vc is found to be changing linearly with frequency of incident light being more negative for high frequency. 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 is the relation between wavelength and stopping potential?
If the wavelength is changed to 4000Ao, the stopping potential will become.
How does wavelength affect stopping potential?
The shorter wavelength light produces higher stopping potentials. This validates the fact that higher energy frequencies (shorter wavelength) have more energy to give to the photoelectrons, thus the photoelectrons receive more energy from higher frequencies and are able to leave the metal with a higher kinetic energy.
What is the significance of the slope of graph of stopping potential of an emitter verses frequency of incident radiation?
The slope of graph of stopping potential of an emitter verses frequency of incident radiation is observed to be a constant. The value of slope is measured to be h/e which is independent of nature of emitter.
What is stopping potential?
Stopping potential is defined as the potential required to stop ejection of electron from a metal surface when incident beam of energy greater than the work potential of metal is directed on it.
How do you find frequency when given wavelength and stopping potential?
To Find: Stopping potential = Vs =? Given: Initial frequency = ν1 = 2.2 x 1015 Hz, initial stopping potential = Vs1 =6.6 V, Final frequency = ν2 = 4.6 x 1015 Hz, Final stopping potential = Vs2 = 16.5 V, Charge on electron = e = 1.6 x 10–19 C.
How does the stopping potential vary with 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 type of graph would you get between stopping potential and frequency of incident light?
It is a straight line.
What is meant by threshold frequency?
Definition of threshold frequency
: the minimum frequency of radiation that will produce a photoelectric effect.
On what factor does 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.
How do you find the stopping potential on a graph?
Does stopping potential depends on intensity?
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.
How do you find the threshold frequency on a graph?
So plotting a graph of frequency (f) on the x-axis and maximum kinetic energy (Ek) on the y-axis will give a straight line graph. Where the gradient is the Plank constant (h) and the y intercept is the work function(f), the intercept on the x-axis is the threshold frequency f0.
How will you use stopping potential versus frequency of incident radiation graph to determine the value of Planck’s constant explain?
Plot a labelled graph of [Vs] where Vs is stopping potential of photoelectrons versus frequency ‘f’ of incident radiation. How will you use this graph to determine the value of Planck’s constant? … Slope of the graph = h/e. We can find the slope of graph easily.
How do you find the Planck constant from a graph?
The value for Planck’s constant is the slope of your graph multiplied by e/c where e is the electronic charge (1.6022 x 10-19 C) and c is the velocity of light (2.998 x 108 m/s).
What is the formula for work function?
In equation form, this is given by KEe = hf − BE, where KEe is the maximum kinetic energy of the ejected electron, hf is the photon’s energy, and BE is the binding energy of the electron to the particular material. (BE is sometimes called the work function of the material.)
What is cut of potential?
Stopping potential or cut-off potential is defined as the required potential for stopping the removal of an electron from a metal surface when the incident light energy is greater than the work potential of the metal on which the incident light is focused.
How do you graph the photoelectric effect?
Which one of the two metals has higher threshold frequency?
At zero stopping potential the frequency of incident radiation is more to metal A. Both the metals have the same stopping potential at different frequencies and this frequency is more than metal A. So, metal A has a higher threshold frequency.
What is stopping potential symbol?
Stopping potential is that value of retarding potential difference between two plates which is just sufficient to halt the most energetic photoelectrons emitted. It is denoted by “Vo”.