Experiment on mass of a photon

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SUMMARY

The discussion centers on the experimental limits of photon mass and the implications of light's momentum. Participants reference various studies, including Goldhaber and Nieto's 1971 paper and R.S. Lakes' 1998 research, which report upper limits on photon mass at approximately 6×10-17 eV/c2. The conversation highlights the distinction between momentum and mass, emphasizing that photons exert pressure on objects without possessing mass. The participants also discuss the historical context of experiments demonstrating light's ability to push physical objects, such as Compton scattering and radiation pressure.

PREREQUISITES
  • Understanding of photon momentum and its relationship to mass
  • Familiarity with the principles of special relativity
  • Knowledge of experimental physics methods, particularly in measuring light pressure
  • Basic grasp of electromagnetic theory and Maxwell's equations
NEXT STEPS
  • Research "Compton scattering" and its implications for photon momentum
  • Explore "radiation pressure" experiments and their historical significance
  • Study "Maxwell's equations" to understand light's behavior in a vacuum
  • Investigate recent advancements in "torsion balance" experiments for measuring photon mass
USEFUL FOR

Physicists, students of quantum mechanics, and anyone interested in the fundamental properties of light and its interaction with matter will benefit from this discussion.

  • #31
Slait said:
Everyone that sails too far west disappears, conclusion, the Earth is definitely flat. Cant argue with that logic
What does this even have to do with your rejection of VERIFIED science? The best I can do is tell you to take a look at a quantum mechanics textbook that discusses the mathematics behind the Compton Scattering. See, for example, Zettili's quantum mechanics book section 1.2.3.
 
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  • #33
Slait said:
Again, that equation is based on the energy. I want to see light pushing an object. I don't believe that it can. Science isn't a religion, something isn't true just because a book says so.

The only thing that interferes with my learning is my education. -Albert Einstein

I should say that it is your approach that it the 'religious' one, actually. You 'feel' something should be true yet you reject any evidence for the opposite view by just shifting your ground as new evidence is presented to you.
What is written in Science books (unlike religious texts) is the result of sufficient body of opinion and evidence and has evolved more than a little since Science books were first written. Text books are the effect and not the cause.

You want examples of 'light pushing things'? There are literally billions of photos of nuclear 'events' that indicate strongly that the principle of conservation of momentum is valid (by their self-consistency) and those recorded events involve taking the momentum of photons into account.

Just because those events don't happen to involve things on a scale of a torch pushing a tin can along the road doesn't invalidate the principle.

Also, if the pressure of light on satellites were not taken into account, they would be in the wrong places and with the wrong orientation.

You appear not to want to see these examples as confirmation of your erroneous view. Open your mind to a different interpretation from the one you have at present. Consider that Momentum may not always correspond to mv.
 
  • #34
You can only lead a horse to water. You cannot make it drink, even when you shove the water into its face.

This thread is done.

Zz.
 

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