# Photoelectric Effect Calculator, Formula, Calculation of Maximum KE

### Photoelectric Effect Calculator:

When incident light falls on a metal surface, it emits electrons called photoelectrons and the process is called photoelectric effect.

The emission of photoelectrons and kinetic energy depends on the frequency of the light incident on it. The Photoelectric Effect Calculator gives you insight into the principles of the photoelectric effect as explained by Einstein in 1905.

This was a significant step in the development of quantum physics. Everything in nature consists of atoms made up of atoms and electrons orbiting the nucleus.

Check out our Bor model calculator to find out more information about the structure of the atom. The photoelectric effect is a quantum phenomenon in which electrons are ejected from the surface of an object under the influence of incident light. If a photon collides with an electron and the energy of the photon is greater than the binding energy of the electron, it escapes from the nucleus with some kinetic energy, creating the photoelectric effect.

### Photoelectric Effect Formula:

Photoelectric effect formula is the maximum kinetic energy KE(ev) in electron per volts is equal to the planck’s constant h(js) in joules per second and multiply the frequency of the incident light f(Hz) in Hertz and minus threshold frequency of the surface f0(Hz)  in Hertz. Hence the photoelectric effect formula can be written as

KE(ev) =h(js) (f(Hz) –f0(Hz)

F= (KE /h )+f

f = h (f-KE)

where

KE = is the maximum kinetic energy

F=is the frequency of the incident light

F0  = is the threshold frequency of the surface

H=is the planck’s constant and its value is 6.626 *10-34 Js

Threshold frequency is defined as the minimum frequency of incident radiation below which the photoelectric emission is not possible

### Example:1

In a photoelectric effect experiment, the threshold frequency is 150 HZ and incident light frequency is 200 Hz.Find the maximum kinetic energy of emitted electrons.

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Given that

Threshold frequency f =150Hz

Incident light frequency f =200Hz

Maximum kinetic energy of emitted electrons is KE =h (f-F)

KE= 6.626*10-34 (150-200)

=6.626 *10-34 (50)

=3.313 *10-34

Therefore, the kinetic energy is 3.313 *10-34ev

### Example:2

In a photoelectric effect experiment, the threshold frequency is 350 HZ and incident light frequency is 380Hz.Find the maximum kinetic energy of emited electrons.

Given that

Threshold frequency f =350Hz

Incident light frequency f =380Hz

Maximum kinetic energy of emitted electrons is KE =h (f-F)

KE= 6.626*10-34 (350-380)

=6.626 *10-34 (30)

=187.8 *10-34

Therefore, the kinetic energy is 187.8 *10-34 ev