Rabu, 12 Mei 2010

Basic of Electrons

All materials on earth are formed from the merger of several molecules and atoms. More than one hundred fruit element (or elements) have been discovered and named at this current time. Developments in science today claimed that the atom is not the smallest particles because after the composer who studied there was a structure within the atom. Electrons, protons and neutrons is the author of each atom composer of all materials on this earth. Electrons (negative charge), protons (positive charge) and neutrons (no charge) on functional work in atomic structure. Functionally, the protons and neutrons into a joint that is surrounded by electrons that move by itself.

In the Physics, Electrons have an important role in the electrical, magnetic and thermal conductivity. An electron that moves can provide a magnetic field of the observer and when an electron is accelerated it will absorb or emit radiation in the form of photons. Basically, the electrons have the same amount of electrical charge so as we all know each atom becomes unstable in the context of cargo. Furthermore, the core has the deep-structure consisting of a proton with positive charge and neutrons are not charged.

Through experiments Milikan oil drops, electrons have a negative charge equal to the fundamental unit of electric charge and Similarly, the mass of an electron, ie

Electron mass itself as large as 1 / 1837 the mass of atomic hydrogen, which is the lightest atoms that ever existed. In Electronics, the formation of the components / devices are useful for human life is desired. Namely, in setting properties of electrons in solids, liquids and gases because we know the manufacture of electronics components, not apart from the three types of substance. 1. Electrons are particles and waves that sometimes Dilemma highly unlikely and even the electron is very annoying about both the nature of this electron. It has been known that the electron has two properties namely, the nature of the wave and particle properties as the (material). Both these properties are not consistent arise simultaneously, but it can be proved by some experiments ever conducted.

A. Compton effect
In the Compton effect, electron having particle can be described. If a beam of X-ray free electrons fired into a silence, then there will be differences in waves. For example, photons that have a momentum hv / c collides with an electron is silent. These symptoms are considered as a particle and can be explained by the contradictions.

B. Photoelectric effect
Similarly, Photoelectric effect whereby if a beam is dropped on the metal surface electrons can be emitted from it. Because the photoelectric effect experiment is described that the electron can have a wave nature and the nature of the particles.


C. De Broglie hypothesis
De Broglie was doing works, which brings together two different properties of the electron. Among other things, by giving to unify the above hypothesis. He expressed the momentum as


2. Electron is a wave packet and group velocity. Having a particle and wave properties can be unified by introducing the notion of wave packets and can be explained by the Compton effect, photoelectric effect and the de Broglie hypothesis. In a sense, an explanation of each of the photoelectric effect and Compton effect, and the de Broglie hypothesis, events or experiments suggest that the wave packet, and the group velocity is essentially understanding. In other words, the wave packet is regarded as particles that propagate with group velocity.

3. Experiencing instability uncertain
Principle of uncertain instability is given by Heisenberg in the year 1927. This principle states that "a pair of variable system of physics that states can not be determined immediately and thoroughly." Paired variables were interpreted in principle, namely the position x and momentum position P. If this principle is applied in the previous explained as a wave packet, then the principle can be expressed in various forms, such as the following. We take x and P, T and E as the mistakes of the variable pairs. So the result of multiplying each pair of errors can not be smaller than h, where h is Planck's constant divided by 2 phi.

4. Wave function During this time, have a wave nature of particles has been explained without explaining the properties of waves. Concerned with the wave motion of particles is very different compared with electromagnetic waves and acoustic waves. It's like the vibrations of strings or membranes. In general, the wave motion that does not contain physical property. But the absolute price of the square wave amplitude has some physical interpretation. These quantities express the density function-the possibility of the existence of the particle.

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