What is the work function for silver?
What is the work function for silver?
The work function depends on the configurations of atoms at the surface of the material. For example, on polycrystalline silver the work function is 4.26 eV, but on silver crystals it varies for different crystal faces as (100) face: 4.64 eV, (110) face: 4.52 eV, (111) face: 4.74 eV.
How do you find the work function on a graph?
We can use the two data points given on the graph to determine the equation of the line. First we determine the slope using the rise over run method. Then we determine the y-intercept of the line using one of the points. y = mx + b so for the point (8.203, 1.0960), we plug in the values for x, y, and m and solve for b.
What is the work function φ0 for silver?
Work Functions for Photoelectric Effect
| Element | Work Function(eV) |
|---|---|
| Silver | 4.26-4.73* |
| Sodium | 2.28, 2.36** |
| Uranium | 3.6 |
| Zinc | 4.3 |
Which element has highest work function?
The work function of platinum is the highest while it is the lowest for cesium.
- The work function for platinum is 5.65 eV.
- The work function for cesium is 2.14 eV.
How do you find work function?
- We can use this information to experimentally determine the work function of a material. To begin, let us rearrange the maximum kinetic energy formula to solve for ? : ? = ℎ ? − ? .
- Now recall the electron kinetic energy equation, ? = ℎ ? − ? . m a x.
- Finally, we can make the substitution for frequency: ? = ℎ ? ? − ? .
Is work function same for all metals?
EXPLANATION: Work function solely depends on the material of the metal used. Different metals have electrons present at different energy levels, depending on which the work function varies.
How do you find the work function?
The quantity ϕ = h * f0 is called work function (expressed in units of energy) and it corresponds to the threshold frequency. In our photoelectric effect calculator, the energy of the incident photon and work function are expressed as frequencies.
What is the work function equation?
We can relate the work function, ? , and maximum electron energy, ? m a x , given wavelength, ? , using the formula ? = ℎ ? ? − ? m a x , where ℎ is the Planck constant and ? is the speed of light.
What is the formula of work function?
Since work function does not depend on wavelength of incident light so it will be constant for both cases. Thus, W=λ2hc−eVs1.
Which metal has less work function?
The work function (ϕo) depends on the properties of the metal and the nature of its surface. The work function of platinum is the highest while it is the lowest for cesium.
What is work function of a metal?
The work function of a photo metal is the minimum energy required to just liberate an electron from the metal surface. During the collision of the photons with the electrons, the electron absorbs the energy of the photon completely.
What do you mean by work function?
Definition of work function : the energy that is needed for a particle to come from the interior of a medium and break through the surface —used especially of the photoelectric and thermionic emission of electrons from metals.
