What is the relation between maximum kinetic energy of photoelectron and stopping potential?
What is the relation between maximum kinetic energy of photoelectron and stopping potential?
The maximum kinetic energy of the electrons equal the stopping voltage, when measured in electron volt.
What is the relation between kinetic energy and frequency of the photoelectrons?
the kinetic energy of the electrons is linearly proportional to the frequency of the incident radiation above a threshold value of ν0 (no current is observed below ν0), and the kinetic energy is independent of the intensity of the radiation.
How do you find the maximum kinetic energy of a graph?
The maximum kinetic energy of a photoelectron is given by 𝐸 = ℎ 𝑐 𝜆 − 𝑊 , m a x where ℎ is the Planck constant, 𝑐 is the speed of light, 𝜆 is the wavelength of the incident photon, and 𝑊 is the work function of the metal surface.
How is work function related to threshold frequency?
The energy and frequency of a photon are related by: The minimum energy required to produce photo-emission of electrons is called the work function this depends on the type of metal used. The minimum frequency of light required to give the work function energy is called the threshold frequency.
How do you find the stopping potential from maximum kinetic energy?
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.
Why the stopping potential is negative and the kinetic energy is positive?
A negatively charged electron is repelled from a negatively charged plate, and to climb ‘up’ that potential to reach the plate requires e×V energy (conveniently given in eV!). So, a positively charge plate will attract all emitted electrons, regardless of their kinetic energy upon leaving the solid.
What is the relation between wavelength and kinetic energy?
Hint: We will use the equation to find de-Broglie wavelength to find the kinetic energy of the electron with wavelength 1nm. De-Broglie wavelength of a particle is inversely proportional to the momentum of that particular body. We should know that kinetic energy and momentum of a particle is related as K. E=P22m.
How does the maximum kinetic energy of a photoelectron vary with the frequency v of the incident radiation?
The kinetic energy of photoelectrons at the surface grows linearly with the increasing frequency of incident radiation. Measurements for all metal surfaces give linear plots with one slope. None of these observed phenomena is in accord with the classical understanding of nature.
How do you find the maximum kinetic energy of an ejected electron?
The maximum kinetic energy KEe of ejected electrons (photoelectrons) is given by KEe = hf − BE, where hf is the photon energy and BE is the binding energy (or work function) of the electron to the particular material.
What is the relation between threshold frequency and threshold wavelength?
Threshold frequency is the minimum frequency of the light required to remove an electron out of a metal. Since wavelength of light is inversely proportional to its frequency, the threshold wavelength is the maximum wavelength of the light for which the metal will emit electrons.
What is difference between work function and threshold frequency?
The minimum frequency of the incident light at which the emission of the electrons starts is called the threshold frequency. It is different for different materials. The minimum energy necessary to initiate the photoelectric effect from the metal surface is called the work function.
What is the value of f'(x) on the graph?
Remember that the value of f’ (x) anywhere is just the slope of the tangent line to f (x). On the graph of a line, the slope is a constant. The tangent line is just the line itself. So f’ would just be a horizontal line. For instance, if f (x) = 5x + 1, then the slope is just 5 everywhere, so f’ (x) = 5.
How do you calculate the photoelectric effect from a graph?
You can even relate the photoelectric effect formula to the formula for a straight line graph if it helps you remember what the three parts of the graph represent. y= mx+ b Ekmax= hf + –W hf = Ekmax+ W
What is the relationship between X and Y in a curve?
The relationships shown in ‘curved graphs’ are more complex to describe. One possibility is. that ‘as x increases, y increases slowly at first and then more rapidly’ (Figure 7.4a) or that ‘as x. increases, y increases rapidly at first and then more slowly’ (Figure 7.4b).
What is the difference between F’ and F”?
f’ is the derivative of f, and f” is the second derivative of f, which is the first derivative of f’. Every order of derivative after is just the derivative of the function before that. Comment on Mrigank Rajeev’s post “f’ is the derivative of f, and f” is the second d…” Posted 3 years ago.
