What is the work function of SI?
Work functions of elements
| Ag | 4.26 – 4.74 | Al |
|---|---|---|
| Se | 5.9 | Si |
| Sn | 4.42 | Sr |
| Tb | 3.00 | Te |
| Ti | 4.33 | Tl |
What is the equation for the work function of the metal?
The difference between the electron energy just outside the metal surface, Evac(s), and EF defines the work function of the metal surface, φm = Evac(s) – EF.
What is work function of photoelectric effect?
The work function, Φ, is the minimum amount of energy required to induce photoemission of electrons from a metal surface, and the value of Φ depends on the metal.
What is the equation of work function Mcq?
Explanation: According to the equation, W0 = hv0 = \frac {hc}{\lambda_0}, the work function is inversely proportional to the wavelength. So metal A with lower work function has a higher threshold wavelength.
What is the formula of photoelectric effect?
By conservation of energy, this reasoning led Einstein to the photoelectric equation Ek = hf − ϕ, where Ek is the maximum kinetic energy of the ejected electron.
How do you calculate photoelectric work?
You can see from the photoelectric equation that the condition f > f0 is necessary for the photoelectric effect to occur (because kinetic energy is positive). The quantity ϕ = h * f0 is called work function (expressed in units of energy) and it corresponds to the threshold frequency.
What is Compton shift Mcq?
Explanation: when a photon collides with an electron at rest, the photon gives its energy to the electron. therefore the scattered photon will have higher wavelength compared to the wavelength of the incident photon. this shift in wavelength is called compton shift.
What is the equation of photoelectric effect?
What is work function Ncert?
Work function is the minimum amount of energy required to remove an electron to infinity, from the surface of a given metal.