Is The Speed Of Light Slowing Down ?

AI Thread Summary
The discussion centers on the controversial idea that the speed of light, traditionally considered a constant, may be slowing down. Participants reference various articles and studies, with one noting that a newer observation suggests the fine-structure constant does not vary significantly over time. There is skepticism about the validity of the links provided, with some participants finding them unhelpful or broken. The conversation highlights differing opinions on measurement techniques and the implications of these findings. Overall, the topic remains contentious, with calls for further exploration and discussion.
Nommos Prime (Dogon)
Messages
222
Reaction score
0
Last edited by a moderator:
Astronomy news on Phys.org
The second and third links you posted are dead; the first is really strange, and the last refers to a set of observations which were both difficult to do and gave marginal results; since 2002 (when the article you posted was published) there's been a different observation, based on a cleaner technique, which shows that \alpha does not vary over cosmological time (to within a few percent). This was discussed at some length in another thread here in PF; I'll find it if you're interested.
 
The Links work fine from here in Australia (got somebody else to check it for me).

I don't see how thefirst Link is strange, it proves something is wrong with our measurements.

I've looked through the "cleaner" technique (I diasagree that it's "cleaner").

No matter, I'll leave it alone.
 
The first link does not pertain to a slowing speed of light. It pertains to the positions of pulses within a signal.

I didn't get a chance to review the second link.

The 3rd link isn't working for me either.

I'd be interested to see further discussion of the 4th link. Maybe I'll dig up that old thread...
 
Is a homemade radio telescope realistic? There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs. Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
3I/ATLAS, also known as C/2025 N1 (ATLAS) and formerly designated as A11pl3Z, is an iinterstellar comet. It was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station at Río Hurtado, Chile on 1 July 2025. Note: it was mentioned (as A11pl3Z) by DaveE in a new member's introductory thread. https://www.physicsforums.com/threads/brian-cox-lead-me-here.1081670/post-7274146 https://earthsky.org/space/new-interstellar-object-candidate-heading-toward-the-sun-a11pl3z/ One...
Back
Top