KE = hν - Φ
where:
* KE is the kinetic energy of the emitted electron
* h is Planck's constant (6.63 x 10^-34 J·s)
* ν is the frequency of the incident light
* Φ is the work function of the metal (the minimum energy required to remove an electron from the metal's surface)
Explanation:
* hν represents the energy of the incident photon.
* Φ represents the energy needed to overcome the binding force holding the electron to the metal.
* The difference between the photon energy and the work function (hν - Φ) gives the kinetic energy of the emitted electron.
Key Points:
* The photoelectric effect is the emission of electrons from a metal surface when light shines on it.
* The equation shows that the kinetic energy of the emitted electron is directly proportional to the frequency of the light and independent of the intensity.
* The work function is a property of the metal and determines the minimum frequency of light required to cause electron emission (threshold frequency).
Applications:
* Photomultipliers
* Solar cells
* Light detectors
* Image sensors
Important Note: This equation applies to the photoelectric effect in metals. For other materials, the equation may need to be modified slightly to account for different energy levels and band structures.
