Re: Muon lifetime


"Sue..." <suzysewnshow@xxxxxxxxxxxx> wrote in message
news:1142870113.547430.68380@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
|
| Hexenmeister wrote:
| > "Stou Sandalski" <stou.sandalski@xxxxxxxxx> wrote in message
| > news:1142827738.630900.241830@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| > | Hello,
| > |
| > | I've used cosmic ray muons as an example in support of special
| > | relativity... but every time I mention it, I fear the logical question
| > | "Oh but how was the muon lifetime measured at rest"... it hasn't come
| > | up yet... but surely one day it will. So how was the muon lifetime
| > | measured at rest? Or more accurately who/when/where first measured the
| > | muon lifetime at rest.
| > |
| > | Although I do not doubt that SR is valid (for now), I want to know if
| > | people just measured muon decay rates at different velocities and
| > | extrapolated (using SR) the lifetime at rest... since that would kind
| > | of make for a circular argument when it comes to SR validity.
| > |
| > |
| > | Stou
| >
| > When a muon dies they put it on a gurney and wheel it into the morgue
| > where it is kept at a low temperature to slow decay. Then later a
| > pathologist
| > dissects it to find the cause of death, and usually they take the clock
out
| > and find it has stopped at 2.2 microseconds.
| > Cosmic ray muons are similar to ghost trains, you can find out
| > exactly how SR works at
| > http://www.androcles01.pwp.blueyonder.co.uk/Smart/Smart.htm
| >
| <<As you say, you do not doubt that SR is valid, so you may as well
| find out how it works. >>
| It works like this:
| "Retarded potential"
| http://farside.ph.utexas.edu/teaching/em/lectures/node50.html
|
| Sue...

http://tinyurl.com/kcbjq
Androcles.



.