Where Does Light Come From and How Is It Produced?

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Discussion Overview

The discussion centers on the mechanisms for producing light or radiation, exploring various methods and the nature of light itself. Participants inquire about the state of matter of light and its behavior over time, particularly in the context of high-energy photons in 'empty' space.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose annihilation as a mechanism for producing light, while others seek additional examples.
  • There is a question regarding the state of matter of light, with a participant asserting that light is a quantum object.
  • A participant suggests that a high-energy photon will remain a quantum object indefinitely if it does not interact with anything, but its wave function frequency will red-shift due to the accelerated expansion of space.
  • Another participant requests clarification on how light bulbs work and asks for a list of different mechanisms for light production.
  • One participant explains that light is produced by accelerating electrical charges or changing the electromagnetic field, with examples including heating materials and incandescent light bulbs.

Areas of Agreement / Disagreement

Participants express differing views on the mechanisms of light production and the nature of light, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

Some claims about the mechanisms of light production depend on specific definitions of terms like "quantum object" and may involve assumptions about the behavior of photons in various contexts.

VaccumEnergy
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What are the different mechanisms for producing light or radiation. Annihilation comes to my mind. What are some other ways?
Also, what state of matter is light? Given that a high energy photon* flows for an infinite amount of time through 'empty' space will it stay as it is forever or would there be a possibility of it changing into something else?

*[Edit: missed word]
 
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VaccumEnergy said:
What are the different mechanisms for producing light or radiation. Annihilation comes to my mind. What are some other ways?
That's really the only way you can think of? How do you think light bulbs work?

Also, what state of matter is light?
light is a quantum object.

Given that a high energy photon* flows for an infinite amount of time through 'empty' space will it stay as it is forever or would there be a possibility of it changing into something else?
It will remain a quantum object if it doesn't hit anything but due to the accelerated expansion of space, its wave function frequency will continue to red-shift more and more forever.
 
phinds said:
That's really the only way you can think of? How do you think light bulbs work?

light is a quantum object.

It will remain a quantum object if it doesn't hit anything but due to the accelerated expansion of space, its wave function frequency will continue to red-shift more and more forever.

Fundamentally speaking, how does a light bulb work? And what other ways are there, could you provide a list please.

Define quantum object.
 
VaccumEnergy said:
What are the different mechanisms for producing light or radiation. Annihilation comes to my mind. What are some other ways?
Also, what state of matter is light? Given that a high energy photon flows for an infinite amount of time through 'empty' space will it stay as it is forever or would there be a possibility of it changing into something else?
Light is electromagnetic waves, and it is produced by accelerating electrical charges or otherwise changing the electromagnetic field at one point; ripples in the field spread out from the disturbance the way that ripples in water spread out from wherever the surface of the water is disturbed.
There are many many ways of accelerating charges; one of the more common methods is to heat something because that causes the atoms to move around faster and they're made up of charged particles. That's how fires and incandescent light bulbs produce light, and the reason why a hot piece of metal will glow.
 

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