How do you find the work function 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.
What is the work function formula?
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 work function Class 11?
Work function is a property of a material, which is defined as the minimum quantity of energy which is required to remove an electron to infinity from the surface of a given solid.
How do you find the work function in eV?
So 1 eV = (1.6 x 10^-19 coulombs)x(1 volt) = 1.6 x 10^-19 Joules. Now let’s calculate the frequency of the 1 eV photon. E = hf, so f = E/h. Hence, f = 1 eV/6.63 x 10-34 Joule-sec x (1.6 x 10-19 Joule / 1 eV) = 2.41 x 1014 sec-1 or 2.41 x 1014 Hz ( Hz means 1/sec).
What is the formula of threshold frequency?
The formula of threshold frequency is W= hv0. Here v0 is the photoelectric threshold frequency of the electromagnetic light rays, W is the work function of the metal body.
What is threshold frequency formula?
What is the SI unit of work function?
The SI unit of work is the joule (J), the same unit as for energy.
What is the unit of work function?
Work function is expressed in eV, and 1eV=1. 6×10−19 J. By definition, Electronvolt (eV) is the amount of energy gained (or lost) by the charge of a single electron moved across an electric potential difference of one volt.
What is the formula of threshold energy?
Kmin = Kth = −Q MX + mx MX This equation is valid if the energies are much less than rest mass energies of the involved particles. In other words, the kinetic energy and momentum of particles can be treated classically, or non-relativistic.
What is the threshold frequency symbol?
electromagnetic phenomena The photoelectric threshold frequency, symbolized by the Greek letter nu with subscript zero, ν0, is that frequency at which the effect is barely possible; it is given by the ratio of the work function symbolized by the Greek letter psi, ψ, to Planck’s constant (ν0 =…