What causes the photon to move at different frequencies?

1. Dec 20, 2015

netqwe

What causes the photon to move at different frequencies?

2. Dec 20, 2015

Staff: Mentor

A photon does not "move at a frequency," but at the speed of light. The electromagnetic field can oscillate at any frequency, and therefore photons can have any frequency.

3. Dec 20, 2015

netqwe

Do you mean that the oscillation caused by the photon sub particles once it
influenced by the radiation generator instrument / field ?

4. Dec 20, 2015

Staff: Mentor

5. Dec 20, 2015

netqwe

How the electromagnetic field affect the photon ?

6. Dec 20, 2015

Staff: Mentor

The sentence you wrote in post #3.

The electromagnetic field does not affect the photon. Photons are elementary excitations of the EM field.

7. Dec 20, 2015

davenn

.
cuz that statement .....

didn't mean anything

the EM field DOESNT affect the photon
start doing some reading on how EM fields are generated, and what they consist of

https://en.wikipedia.org/wiki/Electromagnetic_field

https://en.wikipedia.org/wiki/Electromagnetism

there's a couple

https://en.wikipedia.org/wiki/Photon

cheers
Dave

8. Dec 20, 2015

lychette

you will find that frequency of a photon is a measure of the energy of a photon. If the frequency changes then the energy changes, perhaps as the result of a collision.

9. Dec 20, 2015

alw34

It's difficult asking questions when you don't know much of about the language used to describe a proper answer.
It turns out that electromagnetic energy and their interactions can be described in many cases via waves, that is spread out phenomena when things are large. Radio transmitters and receivers would be an example. But at the tiny level of atomic particles, that description fails to match experimental evidence. At such tiny scales it turns out that electromagnetic interactions take place in discrete levels as point particle interactions; we call those discrete packets of energy photons. They have various energies which means they are associated with electromagnetic fields of different frequencies.

As described in the Wikipedia article referenced in an earlier post, material objects [atomic and sub atomic particles] ".. that emit and absorb light do so in amounts of energy that are quantized (i.e., they change energy only by certain particular discrete amounts and cannot change energy in any arbitrary way)." As described, Compton scattering of single photons by electrons, and black body radiation descriptions, illustrate the quantized nature of light...it occurs only in discrete rather than continuous energies. When an atom absorbs or emits some electromagnetic radiation it does so in discrete amounts....that is a photon is emitted or absorbed, say in an atom, never as 'one and a half' photons.....

10. Dec 21, 2015

netqwe

Is there an experiment that demonstrates that the undulating movement of the photon is due to the hit of the electromagnetic field particles at it without any connection to the photon sub particles internal interactions ?
And if the photon sub particles not exists , how photon influenced by a specific electromagnetic field from the range ?

Last edited: Dec 21, 2015
11. Dec 21, 2015

davenn

The photon doenst have an undulating motion

photon sub particles ?? what do you think they are ? where did you read that ?

Dave

12. Dec 21, 2015

Staff: Mentor

13. Dec 21, 2015