What is Rest Mass? Explaining Photon Mass Zero

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SUMMARY

Rest mass is defined as the mass an object possesses when observed in its own frame of reference. Photons, which are particles of light, have a rest mass of zero because they do not possess any mass when stationary. This fundamental property of photons is critical in understanding their behavior in physics, particularly in the context of relativity and electromagnetic theory.

PREREQUISITES
  • Understanding of basic physics concepts, particularly mass and energy.
  • Familiarity with the theory of relativity.
  • Knowledge of electromagnetic theory.
  • Basic comprehension of particle physics.
NEXT STEPS
  • Research the implications of massless particles in quantum mechanics.
  • Study the relationship between energy and mass in Einstein's theory of relativity.
  • Explore the concept of frame of reference in physics.
  • Learn about the properties of photons in electromagnetic theory.
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in the fundamental properties of light and mass in the context of modern physics.

imran
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what is rest mass? why does a photon have rest mass zero? :rolleyes:
 
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Rest mass is the mass an object has when you are in its frame of refrence (IE its stationary to you). Photons have rest mass zero because they dont have any mass :)
 
thank q for ur ans
 

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