Understanding Light: Questions & Answers

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SUMMARY

This discussion centers on the fundamental nature of light, addressing key concepts such as photon emission, reflection, and the electromagnetic wave model. Participants clarify that light is emitted when electrons transition between energy levels, and that photons propagate in all directions. The conversation also highlights that light from reflective surfaces is primarily reflected rather than absorbed and re-emitted, with no energy loss in the process. Additionally, the discussion emphasizes the need for a solid understanding of multi-variable calculus and Maxwell's equations to grasp the complexities of electromagnetic waves and quantum mechanics.

PREREQUISITES
  • Understanding of quantum mechanics, specifically electron transitions and photon behavior.
  • Familiarity with Maxwell's equations and their role in electromagnetic wave propagation.
  • Knowledge of multi-variable calculus for solving partial differential equations (PDEs).
  • Basic concepts of wave-particle duality and the nature of photons.
NEXT STEPS
  • Study Maxwell's equations to understand the relationship between electric and magnetic fields in electromagnetic waves.
  • Learn about quantum electrodynamics (QED) to explore the interactions of light and matter at a fundamental level.
  • Research the principles of wave-particle duality and how they apply to light and photons.
  • Investigate the effects of gravitational redshift on photon energy as it propagates through space.
USEFUL FOR

Students and professionals in physics, particularly those focused on optics, quantum mechanics, and electromagnetic theory, will benefit from this discussion. It is also valuable for educators seeking to clarify complex concepts related to light and its properties.

  • #31
Padremo, since you posted the feynman lectures, could you help me with my questions about them and/or the other topics as well? Any help will be appreciated. Thank you.
 
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  • #32
GRB 080319B -- Once again, let me suggest that to answer your questions, and for you to understand the answers is an exercise of three years of study -- two if you are really quick. That is to say, you will need to understand and master most of Jackson's E&M text, and then master a basic course in QM, and then master an introductory course in quantum electrodynamics. Look at it as: the answers to your questions will take several hundred pages of text. For the level of specificity you request, there are not any short cuts. That's life in the physics world. (If you don't understand thermal radiation, then you are in trouble, and thus you need a course or book on the physical phenomena that lead to quantum theory -- often advertised a a beginning course in atomic physics -- like Planck and Einstein and Bohr. If you do not have a good grasp of the basic atomic physics involved, you will never understand light.

Good luck,.
Reilly Atkinson
 
  • #33
reilly said:
GRB 080319B -- Once again, let me suggest that to answer your questions, and for you to understand the answers is an exercise of three years of study -- two if you are really quick. That is to say, you will need to understand and master most of Jackson's E&M text, and then master a basic course in QM, and then master an introductory course in quantum electrodynamics. Look at it as: the answers to your questions will take several hundred pages of text. For the level of specificity you request, there are not any short cuts. That's life in the physics world. (If you don't understand thermal radiation, then you are in trouble, and thus you need a course or book on the physical phenomena that lead to quantum theory -- often advertised a a beginning course in atomic physics -- like Planck and Einstein and Bohr. If you do not have a good grasp of the basic atomic physics involved, you will never understand light.

Good luck,.
Reilly Atkinson

Thank you very much for your advice reilly. I am going to study this topic in-depth and refrain from posting questions whose answers I wouldn't understand without a substantive foundation. I apologize for not listening to your help the first time. I will leave this thread open for anyone else to post their questions.

Thank you all for your help.
 

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