5 ms·

Test can show if the speed of light has changed

• oceanswave 10y ago
  Continuous Intrgration for the universe. Interesting.
  • euyyn 10y ago
    Well it doesn't really tell whether it's changed from a moment ago. Rather whether it was much faster when the cosmic microwave background radiation was emitted, almost at the beginning of the Universe.
  • adtac 10y ago
    Next is coverage (dark matter) ;)
• wcoenen 10y ago
  1 meter is defined as the distance travelled by light in 1 / 299,792,458 seconds. Doesn't this mean that "light slowing down" would be indistinguishable from "space expanding"?