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Gajan1234
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Can someone explain what is stopping potenial is and can explain the formula : e × Vs. Does the v stand for voltage
Can you show us the reading you've been doing about this please? Thanks.Gajan1234 said:Can someone explain what is stopping potenial is and can explain the formula : e × Vs. Does the v stand for voltage
Jilang said:When a photon is absorbed some of its energy is used to free the electron and what is left over is given to the freed electron as kinetic energy.
Jilang said:When a photon is absorbed some of its energy is used to free the electron and what is left over is given to the freed electron as kinetic energy.
In the (over)simplified treatment of the photoelectric effect that you commonly find in introductory textbooks like that, the "energy used to free the electron" is not the same for each electron. Crudely and simplistically speaking, think of it as reflecting how "deeply buried" the electron was in the material. A certain minimum energy is needed to free the electron, corresponding to a maximum kinetic energy after ejection.cryora said:in Serway's "Modern Physics", he mentions a maximum kinetic energy for the freed electron being equal to the leftover photon energy, which implies there are probably other processes which might take away said energy.
The photoelectric effect is a phenomenon in which electrons are emitted from the surface of a material when it is exposed to light of a certain frequency.
The potential in the photoelectric effect refers to the amount of energy required to remove an electron from the surface of a material. It is also known as the work function.
The formula for calculating the energy of a photon is E = hf, where E is the energy in joules, h is Planck's constant (6.626 x 10^-34 J/s), and f is the frequency of the incident light in hertz.
Voltage affects the photoelectric effect by controlling the speed at which electrons are emitted from the surface of a material. Higher voltage means higher kinetic energy for the emitted electrons.
The photoelectric effect has many practical applications, such as in solar panels, photodiodes, and photomultiplier tubes. It is also the basis for understanding the dual nature of light and the concept of photons.