speed of electricity

[Alistar7]

Move down to the south, where everything moves three days behind the speed of life......

 

[f95toli]

The reason why frequency is important is that it determines the energy of a single photon, the energy is equal to frequency x Planck's constant.

A simplified explanation:
An atom can absorb a photon and increase it's energy. In the same way it can emitt a photon in order to reduce its energy,this is known as the photoelectric effect (Einstein).
When the energy of an atom increases/decreases the way it interacts with its neighbors changes, which it turn means that photons can affect chemical processes (for example in a plant where the extra energy is used to make glucose).

In the case of the lightbulb the wire is heated up the current and the atoms can absorb some of that energy, when the atom relaxes it emitts a photon= the wire emitts light.

Search for "photoelectric effect" and you should be able to find a better explanation somewhere.

 

[PowerEngineer]

Originally posted by: TTM77
I feel that you are saying using the spectrum frequency to determin the property and I think it is wrong. Everything have frequency. Even the engine in your car has frequency and it measured by RPM. But the engine is not light nor electricity.

The engine is not electromagnetic radiation either... Both light and AC electricity are.

So many questions but so little answer.

I think the responses you are getting to your questions will seem better to you if you take a little more time to digest them.

 

[RossGr]

An atom can absorb a photon and increase it's energy. In the same way it can emitt a photon in order to reduce its energy,this is known as the photoelectric effect (Einstein).

The photoelectic effect not emission of a photon. It is the process where an ELECTRON is freed from the atom by the adsoption of a photon of the correct energy. Enistein's Nobel Prize winning paper on this effect is the first formal development of ligth as a partical and is starting point of Quantum Mechanics.

Adsoption and emission of photons is simply the way atoms work, it is the reason we precieve the world as we do.

 

[f95toli]

You are right, I did not think before I wrote.
The point was simply that the photelectric effect is the simplest form of interaction between an atom and a photon. But even though the mechanism is the same the absorbtion has to free the electron in order for it to be called the photoelectric effect.

 

[rjain]

The propagation of electricity is ACTUALLY the propagation of photons. It is not the electrons that move to create the electricity, but the EM fields, which are photons. However, these photons are continutally interacting with the sea of metallically bonded electrons around them, slowing down the group velocity to approx 2/3 c.