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JGM_14
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Is there a frequency at which electrons do not flow (too high freq.)?
Fastest switching transistor- 508 Ghz
Fastest switching transistor- 508 Ghz
If I remember correctly, an accumulation of charge inside a metal lasts less than about 10^(-15) s; it means we should go up to at least 10^15 Hz with frequency, that is to visible wavelenghts.JGM_14 said:the switching of the direction of the current in the wires becomes too fast so the electrons would not vibrate as in AC
Is it possible to happen at frequencies that super high?
The material would become insulating because it's as if the electrons couldn't move freely, however the classical description wouldn't be adequate anylonger and you should use the quantum one.JGM_14 said:So the wire would "glow" at that high of frequency, or would photons not be emitted?
The simplified theory of conductors and semiconductors uses 'conduction bands' and 'valence bands' to catagorize the energy of electrons in the material. Those are definitely quantum concepts. But the propagation of high frequencies along a wire are derived (I think) from classical E&M ... the external fields can only propagate so far in a conductor because of its super high index of refraction. Is there a quantum derivation of this? The probability that a photon of a given energy (wavelength) will penetrate to a given depth in a wire (modelled as a space charge constrained in a cylindrical potential well)? Perhaps there are tunneling solutions where regions of the conductor can participate in high frequency conduction and 'get around' the classic skin effect.lightarrow said:The material would become insulating because it's as if the electrons couldn't move freely, however the classical description wouldn't be adequate anylonger and you should use the quantum one.
Frequency refers to the number of times a particular event or phenomenon occurs within a specific time period. In the context of electrons, frequency is used to describe the rate at which electrons oscillate or vibrate.
The frequency of an electron's vibration affects its energy level. Higher frequency vibrations correspond to higher energy levels, while lower frequency vibrations correspond to lower energy levels. This relationship is described by the wave-particle duality principle in quantum mechanics.
Frequency and wavelength are inversely proportional. This means that as the frequency of an electron increases, its wavelength decreases, and vice versa. This relationship is described by the equation: c = λf, where c is the speed of light, λ is the wavelength, and f is the frequency.
The unit of measurement for frequency is hertz (Hz), which represents one cycle per second. In the context of electrons, the frequency is typically measured in terahertz (THz), which represents one trillion cycles per second.
When an electron absorbs energy, it becomes excited and moves to a higher energy level. The frequency of the absorbed energy corresponds to the difference in energy levels between the initial and final states of the electron. Similarly, when an electron emits energy, it transitions from a higher energy level to a lower one, and the frequency of the emitted energy corresponds to the energy difference between these levels.