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Abhinay Soanker
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I know this question might be too simplified but, What is the primary causes generation of light (electromagnetic waves) by electron? Is it vibration motion of electron or the motion of electron around the nucleus?
How much do you know about energy levels within atoms?Abhinay Soanker said:I know this question might be too simplified but, What is the primary causes generation of light (electromagnetic waves) by electron? Is it vibration motion of electron or the motion of electron around the nucleus?
I have knowledge about energy level in atomsComeback City said:How much do you know about energy levels within atoms?
Drakkith, Thank you for in-detail explanation. But regarding your second point, I understand when electron absorbs EM waves they jump to higher state and vice-versa. But is it because its increase in tangential kinetic energy (tangential velocity) or electron just jumps to higher order state during absorption of EM waves?Drakkith said:There are two primary ways depending on the state of the electron:
1. For a free electron, an EM wave can be generated by simply accelerating the electron. The amplitude and frequency of the EM wave depends on the magnitude of the acceleration of the electron.
2. For an electron bound to an atom or molecule, it can emit an EM wave by dropping from a higher energy state to a lower energy state.
3. For bulk materials, the mechanism is a mix of 1 and 2. Electrons are accelerated by collisions with ions and other electrons and emit EM waves as a result. This is where thermal radiation comes from. In addition, a small amount will transition between energy states if the material has some sort of bandgap, emitting specific frequencies as a result. As far as I know, this happens mainly in semiconductors and insulators, not conductors. Semiconductor lasers rely on a version of this 2nd part to generate laser light.
You are trying to apply a mechanical model to a QM phenomenon which is always a risky thing to do. An atom is not a tiny solar system.Abhinay Soanker said:But is it because its increase in tangential kinetic energy
Abhinay Soanker said:Drakkith, Thank you for in-detail explanation. But regarding your second point, I understand when electron absorbs EM waves they jump to higher state and vice-versa. But is it because its increase in tangential kinetic energy (tangential velocity) or electron just jumps to higher order state during absorption of EM waves?
Drakkith's post sums it up well, since he considered all the different possible cases (I was thinking just electrons in atoms). In atoms, when an electron drops down an energy level, it will emit electromagnetic radiation whose energy corresponds to the "difference" of energy between the energy levels.Abhinay Soanker said:I have knowledge about energy level in atoms
Actually, that is an oxymoron. 'Motion' and QM are not on the same planet, although people constantly try to link them together. It's one or the other and you choose according to the situation.Abhinay Soanker said:electron motion is defined based on QM.
Electrons are particles that carry a negative charge and are found in all atoms. When electrons are accelerated or move through a magnetic field, they create a disturbance in the electric and magnetic fields, resulting in the creation of electromagnetic waves, which we perceive as light.
In light bulbs, electrons are heated and accelerated by the electrical current passing through a filament. As they move through the filament, they emit photons (particles of light) due to their changing energy levels. In stars, electrons in the outer layers of the star are heated and excited by the extreme temperatures and pressures, causing them to emit light. Other sources of light, such as LEDs and lasers, use different methods to excite electrons and produce light.
Yes, the color of light emitted by electrons depends on their energy levels. When an electron drops from a higher energy level to a lower one, it emits a photon of light with a specific wavelength, which determines its color. For example, red light has a longer wavelength than blue light.
Electrons in an atom are restricted to specific energy levels and cannot emit light while staying in the same energy level. Instead, they can jump between energy levels by absorbing or emitting photons, without losing any energy. This process is known as the emission or absorption of light.
Yes, light can be generated through other processes, such as nuclear reactions or by heating a material to extremely high temperatures. In these cases, the light is not generated by electrons, but rather by other particles or atoms in the material.