Speed of Light: Constant or Not?

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SUMMARY

The speed of light in a vacuum, denoted as "c," is a constant value that has been measured repeatedly and consistently. Current scientific consensus holds that ordinary matter cannot exceed this speed. However, discussions around hypothetical exotic particles, such as tachyons, suggest the possibility of speeds greater than c, although these remain unproven and theoretical.

PREREQUISITES
  • Understanding of the theory of relativity
  • Familiarity with the concept of light speed (c)
  • Basic knowledge of particle physics
  • Awareness of hypothetical particles like tachyons
NEXT STEPS
  • Research the theory of relativity and its implications on speed limits
  • Explore the properties and theories surrounding tachyons
  • Investigate experimental measurements of the speed of light
  • Learn about the implications of faster-than-light travel in theoretical physics
USEFUL FOR

Physicists, students of physics, and anyone interested in the fundamental principles of speed and light in the context of modern physics.

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How can one say that speed of light is constant.Is there any possibilities of speeds greater the c.If Yes/no then why?
 
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1. It's been measured. Lots of times.
2. Not for ordinary matter. There are some hypothetical exotic particles that may exceed C though.
 
Thank you russ_watters
 

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