Quantum physics for beginners: A comprehensive guide for the starter by Martinet Alex

Author:Martinet, Alex
Language: eng
Format: epub
Published: 2021-06-15T16:00:00+00:00

In the 1890s, Heinrich Hertz noticed that when light hits a metal surface with frequency, electrons with kinetic energy are removed from the surface. The model used to understand this phenomenon was that electrons are part of an atom, and if they receive enough power, this is known as the work function Φ for a given metal. These electrons, called photoelectrons, will be released and leave the metal with kinetic energy, which will be the difference between the incident energy Ei and the operating mode according to the rule of conservation of energy.

Te = Ei – Φ

It has been noted that below a certain critical frequency ��c, photoelectrons are not emitted, no matter how intense the light field is. This required frequency depends on the metal. This frequency c is called the threshold frequency. It has also been observed that as the frequency of the occurrence beam extensions, the maximum active energy of the released photoelectrons also increases if we maintain the light intensity.

Another interesting observed result was that the emission of photoelectrons occurs almost immediately after the light hits the metal, without significant delay, even at very low light intensities. In addition, the kinetic energy of each photoelectron remains constant even if the power of the incident radiation of a specific frequency is increased.

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