Light some interesting questions and an observation

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SUMMARY

This discussion centers on the fundamental nature of light, addressing questions about its behavior, properties, and interactions. Key points include the assertion that light always travels at the speed of light (c) and cannot be destroyed, only absorbed, transferring energy to particles. The conversation also touches on Maxwell's equations and quantum electrodynamics (QED), emphasizing their relevance in understanding light as both a wave and a particle. The participants highlight the complexity of these concepts and the necessity for deeper study to gain clarity.

PREREQUISITES
  • Understanding of Maxwell's equations
  • Familiarity with quantum electrodynamics (QED)
  • Basic knowledge of electromagnetic theory
  • Concept of light as both a wave and a particle
NEXT STEPS
  • Study Maxwell's equations in detail
  • Explore quantum electrodynamics (QED) and its implications for light
  • Research the mechanisms of photon emission and absorption
  • Investigate the relationship between mass, speed, and time in relativistic physics
USEFUL FOR

Physicists, students of electromagnetism, and anyone interested in the fundamental properties of light and its interactions with matter.

  • #61
For animations/simulations of electromagnetic fields you can try http://www.vectorfields.com/".
 
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  • #62
trogan said:
7. Where does it end up ?
Tony

It seems to me that, unless absorbed by a particle, light will end up at the edge of the universe. Could it then be converted to space thus causing the expansion of the universe ? (and incidentally indicating that space is base state energy). Thus the breakdown of matter would be fueling the expansion of the universe. Which would be increasing over time if the number of stars in the universe is increasing.

Actaully, it seems better to say that the light is converted into an expansion force that is applied to the edge of the universe and this is the way the universe expands.
 
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