Test can show if the speed of light has changed

#1

Post by lucodibidil » Mon, Nov 28, 2016, 7:59 AM UTC

Test can show if the speed of light has changed
engadget.com

Re: Test can show if the speed of light has changed

#2

Post by oceanswave » Mon, Nov 28, 2016, 10:47 AM UTC

Continuous Intrgration for the universe. Interesting.

Re: Test can show if the speed of light has changed

#3

Post by euyyn » Mon, Nov 28, 2016, 11:09 AM UTC

oceanswave wrote: post #2

Continuous Intrgration for the universe. Interesting.

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.

Re: Test can show if the speed of light has changed

#4

Post by adtac » Mon, Nov 28, 2016, 12:35 PM UTC

oceanswave wrote: post #2

Continuous Intrgration for the universe. Interesting.

Next is coverage (dark matter) ;)

Re: Test can show if the speed of light has changed

#5

Post by wcoenen » Mon, Nov 28, 2016, 2:11 PM UTC

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"?