SUMMARY
The speed of light in a vacuum, denoted as 'c', has remained constant since the Big Bang, according to current theoretical and experimental evidence. Discussions highlight that it is not meaningful to question the constancy of universal constants like 'c' that possess units. Relevant resources include the Usenet Physics FAQ and papers such as Duff's "Comment on time-variation of fundamental constants," which provide further insights into this topic.
PREREQUISITES
- Understanding of universal constants in physics
- Familiarity with the concept of the speed of light (c)
- Basic knowledge of cosmology and the Big Bang theory
- Awareness of theoretical physics literature and resources
NEXT STEPS
- Read the Usenet Physics FAQ on constants at http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/constants.html
- Explore the discussion on time-variation of fundamental constants at http://physics.stackexchange.com/questions/34874/has-the-speed-of-light-changed-over-time
- Review Duff's paper "Comment on time-variation of fundamental constants" available at http://arxiv.org/abs/hep-th/0208093
- Investigate the implications of constant 'c' in modern physics theories
USEFUL FOR
Physicists, cosmologists, and students of theoretical physics interested in the constancy of universal constants and the implications of the speed of light since the Big Bang.