What is stopping potential and its formula?
Given: Stopping potential = Vs = 2 V, wavelength of incident light = λ = 160 nm = 160 x 10-9 m, Threshold wavelength = λo = 240 nm = 240 x 10-9 m, speed of light = c = 3 x 108 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 potential or retarding potential?
The stopping potential, V0, is the retarding potential at which no more electrons are detected, and tells us the kinetic energy of the fastest electrons i.e. Kmax=eV0.
What is stopping potential and why it is negative?
The negative potential of the collector plate at which the photoelectric current becomes zero is called stopping potential or cut – off potential.
What is meant by stopping voltage?
Stopping voltage: Stopping voltage (or stopping potential) refers to the voltage difference needed to stop electrons from travelling between plates and generating a current in the photoelectric experiment.
What is stopping potential and threshold frequency?
Answer : 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.
What is stopping potential BYJU’s?
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.
What is the stopping potential when the?
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.
What happens when stopping potential is zero?
At the stopping potential the kinetic energy of the electrons becomes zero.
What is stopping potential Ncert?
What is the another name of stopping potential?
Answer: 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.
What is the definition of threshold frequency?
Definition of threshold frequency : the minimum frequency of radiation that will produce a photoelectric effect.
How does stopping potential occur?
Why is stopping potential important?
The stopping potential and light wavelength or its frequency allows us to calculate the energy required to eject an electron from the metal surface. That energy is called the work function.
What does stopping potential depend on?
The stopping potenial depends on frequency of incident light and nature of the emitter material. for a given frequency of incident light, it is independent of its intensity.
What is threshold energy physics?
In particle physics, the threshold energy for production of a particle is the minimum kinetic energy a pair of traveling particles must have when they collide. The threshold energy is always greater than or equal to the rest energy of the desired particle.
What is photoelectric effect define threshold frequency and stopping potential?
What is the meaning of the term’stopping potential’?
Stopping potential is defined as the minimum negative potential gradient of the plates at which the photoelectric current becomes zero. In case of stopping potential, the value of retarding potential difference between two plates is sufficient to stop the most energetic photoelectrons emitted. It is not dependent on the intensity of incident light.
What is the purpose of the stopping potential in photoelectric experiment?
The stopping potential introduces the voltage difference needed to stop electrons (e) from flowing between two metal plates and creating a current in the photoelectric experiment. Although, the stopping potential or stopping voltage is used to determine the kinetic energy (K) that the electrons (e) have as they are emitted from the metal plate.
What is the purpose of the stopping potential of a metal?
Although, the stopping potential or stopping voltage is used to determine the kinetic energy (K) that the electrons (e) have as they are emitted from the metal plate. The stopping voltage is denoted by Vo.
What is the meaning of cut off 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. Stopping potential does not depend on the intensity of incident radiation.