If all particles were different sizes, would the speed of light stay the same

In summary, the concept of "size" for particles is ambiguous. Photons can have a wavelength the size of a galaxy and still move at the speed of light. Other particles with mass travel slower than the speed of light, except for gluons which cannot propagate freely. In terms of measuring the size of a photon, all light and electromagnetic radiation travel at the speed of light in a vacuum.
  • #1
KarminValso1724
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For example, if photons were the size of galaxies, would they still move at the speed of light?
 
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  • #2
The concept of "size" is ambiguous for particles. Photons can in principle have wavelength the size of a galaxy, and it still moves at the speed of light.
Other particles, except gluons, have mass so they travel slower than the speed of light. Gluons can't propagate freely, so don't have a speed.
 
  • #3
KarminValso1724 said:
For example, if photons were the size of galaxies, would they still move at the speed of light?

How were you able to measure the size of a photon in the first place?

ALL light/EM radiation, by definition, travels at c in vacuum.

Zz.
 
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1. Would the speed of light change if particles were all different sizes?

No, the speed of light is a constant in the universe and is not affected by the size of particles.

2. How do particles' sizes affect the speed of light?

Particles' sizes do not affect the speed of light. The speed of light is determined by the properties of space and time.

3. What determines the speed of light in a vacuum?

The speed of light in a vacuum is determined by the fundamental constants of the universe, such as the speed of light, the permeability of free space, and the permittivity of free space.

4. Could the speed of light change in different environments?

Yes, the speed of light can change in different mediums, such as water or glass. This is due to the interaction of light with the particles in the medium.

5. Is the speed of light the same throughout the universe?

Yes, the speed of light is a universal constant and remains the same throughout the universe, regardless of the size or composition of particles.

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