What would happen if the speed of light was much lower?

If the speed of light were much lower, many physical processes in the universe would be drastically different. Here are a few examples of the potential impacts:

Electromagnetic radiation: Light, radio waves, and other forms of electromagnetic radiation would travel much more slowly. This could have significant implications for communication and navigation.

Particle interactions: The speed of light plays a crucial role in determining the energy of particles in high-energy physics. A slower speed of light would result in different energies and interactions between particles.

Gravitational systems: The speed of light is also involved in the formation and stability of gravitational systems, such as stars and galaxies. A slower speed of light could change the way these systems evolve and interact.

Relativity: The theory of special relativity, which is based on the constant speed of light, would need to be revised. The entire framework of modern physics could be altered in significant ways.

Overall, a slower speed of light would have far-reaching consequences for our understanding of the universe and the laws of physics.