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2 days ago · The stopping potential (V₀) is the minimum potential difference that needs to be applied to stop the most energetic photoelectrons emitted from a material. It is directly proportional to the maximum kinetic energy of the photoelectrons.
Stopping potential is the negative potential of the opposite electrode when the photo-electric current falls to zero. The threshold frequency is described as the frequency when the photoelectric current stops below a particular frequency of incident light.
Sep 12, 2022 · When a metal surface is exposed to a monochromatic electromagnetic wave of sufficiently short wavelength (or equivalently, above a threshold frequency), the incident radiation is absorbed and the exposed surface emits electrons. This phenomenon is known as the photoelectric effect.
This value of the retarding voltage is called the stopping potential or cut off potential V o. Since the work done by the retarding potential in stopping the electron of charge e is eV o, the following must hold eV o = K max.
Stopping potential is the minimum negative voltage applied to the anode to stop the photocurrent. The maximum kinetic energy of the electrons equal the stopping voltage, when measured in electron volt.
The potential at which this occurs is called the stopping potential. It is a measure of the maximum kinetic energy of the electrons emitted as a result of the photoelectric effect. What Lenard found was that the intensity of the incident light had no effect on the maximum kinetic energy of the photoelectrons.
Photoelectric Effect - Stopping Potential. Consider an evacuated glass tube containing two metal plates. If we illuminate one of the metal plates with photons of energy above the work function value of the metal, electrons absorb the photons and escape from the surface of the metal.
The potential difference at which the photocurrent stops flowing is called the stopping potential. Figure 6.8 An experimental setup to study the photoelectric effect. The anode and cathode are enclosed in an evacuated glass tube.
Let's explore how the graph of stopping potential vs frequency can be used to calculate the Planck's constant experimentally! From Einstein's photoelectric equation, this graph is a straight line with the slope being a universal constant.
Created by Mahesh Shenoy. Questions. Tips & Thanks. Want to join the conversation? Sort by: Top Voted. mastersgrevolt. 3 months ago. I know this is basic physics class, but electron ejected with 4 or 9eV should have pretty high velocity nearing that of speed of light, so classical equation for k.e. shouldn't work right?
