Measuring One-Way Anisotropy of Light Speed

Click For Summary
SUMMARY

The forum discussion centers on the proposal of an experiment to measure one-way anisotropy of light speed using a central transmitter and twelve independent receivers placed on a rotating circular board. The experiment aims to detect differences in light speed by synchronizing atomic clocks to the earliest pulse received. The conclusion drawn is that if current physics holds true, all measurements should read zero, indicating isotropy of light speed. However, the discussion emphasizes that any detected differences would stem from assumptions made about light speed and time dilation, ultimately reinforcing that isotropy is a coordinate system choice without detectable physical consequences.

PREREQUISITES
  • Understanding of atomic clock synchronization
  • Familiarity with concepts of light speed isotropy and anisotropy
  • Knowledge of time dilation effects in physics
  • Basic principles of experimental design in physics
NEXT STEPS
  • Research atomic clock technology and synchronization methods
  • Explore the implications of time dilation in special relativity
  • Study experimental setups for measuring light speed
  • Investigate the philosophical implications of isotropy in physics
USEFUL FOR

Physicists, experimental researchers, and students interested in the fundamental properties of light and the implications of relativity on time and space.

seb7
Messages
66
Reaction score
0
TL;DR
Proposed method of measuring one-way light speed
I've always thought that light could possibly be transmitted faster in one direction than the other depending on the velocity of its container - despite what the current understanding of physics says! The problem is that its very hard to prove, and to this end I've read through all the different ways one-way light speed has been measured and they all appear to have flaws. So here I'm proposing an experiment which I hoping someone may have the tools to test.

1) central transmitter placed on a large circular board; pulsing with atomic accuracy a beat about 10 times a second.
2) 12 independent receivers placed equally around the board at a distance of about 1 metre from the transmitter. (also require atomic clocks.)
transmission can either be electrical or photons, shouldn't matter.

The receivers constantly attempts to sync by listening to the transmitted pulse, but not using an average, but with the earliest beat over the entire period; then uses this sync to compare with pulses currently being received and displays any differences measured. (between the current and earliest)

The board is then slowly rotated so that they each sync to their earliest time. After a rotation, they should start displaying what differences they are seeing (if one-way speeds do differ).

If current physics are correct, then they should always read zero. If one-way light has any differences in speeds, values greater than zero would appear.
 
Physics news on Phys.org
Doesn't work. If you have an anisotropic speed of light then your clocks drift when you move them - time dilation (or the roughly analogous concept, anyway) is no longer isotropic nor necessarily negligible at low speed. If you don't correct your clocks for this drift then you are assuming light speed isotropy; if you do correct them then you are assuming whatever anisotropy you choose to correct for. Either way, you will detect what you assumed.

Isotropy of lightspeed or otherwise is just a choice of coordinate system. There are no detectable physical consequences.
 
Last edited:
And with the good reply by @Ibix this thread is closed. @seb7 -- we do not allow discussion of personal theories here. You've been with the PF long enough to know that.
 
  • Like
Likes   Reactions: Ibix

Similar threads

  • · Replies 93 ·
4
Replies
93
Views
6K
  • · Replies 6 ·
Replies
6
Views
1K
  • · Replies 42 ·
2
Replies
42
Views
3K
  • · Replies 42 ·
2
Replies
42
Views
2K
  • · Replies 146 ·
5
Replies
146
Views
10K
  • · Replies 53 ·
2
Replies
53
Views
6K
  • · Replies 36 ·
2
Replies
36
Views
3K
  • · Replies 10 ·
Replies
10
Views
1K
  • · Replies 45 ·
2
Replies
45
Views
6K
  • · Replies 25 ·
Replies
25
Views
5K