keirnina asked in Science & MathematicsPhysics · 9 years ago

# What is the Photon's version of the Ohm?

AC/DC vs the Photon.

Instead of defining Photons via Gravitons, maybe the answer is in the Photon's resistance.

The use of the electron became much more practical and safe after it became grounded. And, the photon is associated with electrons, electromagnetic fields etc.

To my understanding (k-12 grad + 2 yrs of Electrical vocational school + google) photons are never at rest, and create gravity. They can be absorbed by electrons, with matching energies. (I imagine how current flow best through gold).

I have not found any research pertaining to this area. If there is, please let me know.

Update:

okay, I get that photons are not gravity. AND if being ignorant means thinking outside of what ever society laid out, I'll take my chances as an opened minded ignorant :]

I'm thinking more so of the future. What is unknown is unheard of. Time is short, electricity is new. In order to come out of the Technological era, the electron must be replaced.

Thank you for the link. I'm soaking it up like a sponge.

Relevance
• 9 years ago

You pretty much missed the point.

According to quantum electrodynamics (QED), all photons come from electrons over time. Using a Feynman Diagram that looks like a big Y, we can describe the photon making process. [See source.] Time travels up the base and through to the top of the Y.

Imagine the base (called a propagator) of the Y as an electron, and as time marches on up the base, it's heading towards the vertex where the base joins the two branches. For some reason (e.g., it loses energy), at the vertex, the electron kicks off a photon, which is the right hand branch. And the electron deviates and heads off along the propagator shown as the left hand branch.

My point is this. Photons are not defined or in any other way associated with gravitons, which are theoretical gravity messenger particles that serve the force of gravity and not at all associated with the electro-magnetic force served by photons.

A second point you missed is that it's the wavefront of the group waves for photons that slows down when entering a medium other than a vacuum. The photons are still going light speed C in between the atoms and molecules of the medium, but, due to being absorbed and re-emitted or simply ricocheting off the atoms and molecules of the medium, their group wave front is slowed to c < C. This is the origin of the refraction index n = C/c.

Source(s): "The Cosmic Landscape" by Leonard Susskind, one of the major string theorists. He spends one whole chapter on explaining, in plain language, how the Feynman Diagrams work and QED.
• 9 years ago

They travel at the speed of light (what else ? :-) ) in the medium through which they are traveling. The speed of light in (transparent) materials (eg glass) is much lower than the speed of light in a vacuum (the speed of light in air is about the same as that in a vacuum)

I believe the reason for this slowing down is the 'resistance' of the overlapping electromagnetic fields of the closely packed atoms making up materials such as glass (atoms in the air are much less 'densely packed' so offer less 'resistance') ...

Photons have (almost) nothing to do with electrical current (which is made up of Electrons, which have mass so must always travel SLOWER than the speed of light ) ... and if you ever tried to shine a light through Gold (or indeed any radiation = Gold is 'almost' lead so 'resists' the passage of photon's very well) you will discover that Photon's do not travel 'best' through metals of any type.

Photon's are 'fundamental' to GUT theory and are the e-m force carrier NOT the gravity carrier (see 'Higgs Boson' if you want to know more about that).

PS. neither the Photon nor the Higgs 'create gravity' :-) :-) :-)

Finally, may I point out that, yes this is the UK section however since k-12 is a US qualification I would like to bet the asker is a confused American ...