Hi Alex,

You must assume that the frequency of the light holds steady. If the frequency slows down, the length you defined keeps getting longer and the duration of one second gets longer. You wouldn't be able to notice this because your measurements would change right along with the slowdown of the frequency. Since time is defined to be dependent on the frequency, you wouldn't be able to detect the change in frequency.

So how can we be so sure the frequency holds steady?

Warm regards,

Paul

• Both wavelength and frequency do not change. - alexander - November 22, 2001 - 23:35 UTC
  • How can we be so sure h, e, or c don't change? (nt) - pmartin - November 23, 2001 - 07:18 UTC
    • I predict... - luis_hamburgh - November 23, 2001 - 07:44 UTC
      • Wavelength of light changes - yanniru - November 23, 2001 - 15:07 UTC
      • Luis, you often makes wrong conclusions. - alexander - November 23, 2001 - 18:46 UTC
        • It was a prediction, not a conclusion - luis_hamburgh - November 23, 2001 - 21:19 UTC
          • Space is expanding, not structures. - alexander - November 23, 2001 - 22:47 UTC
            • So, how did our universe attain its current size? - luis_hamburgh - November 25, 2001 - 20:26 UTC
              • The dark side - yanniru - November 25, 2001 - 21:31 UTC
                • Thanks, Richard - luis_hamburgh - November 26, 2001 - 02:46 UTC
                  • Universal expansion not detectable - yanniru - November 26, 2001 - 16:05 UTC
        • Sums it up - bruce - November 23, 2001 - 22:54 UTC
          • To see the derivation for fsc.. - bruce - November 23, 2001 - 22:57 UTC