On 6/18/2025 7:59 AM, Alan Grayson wrote:
On Tuesday, June 17, 2025 at 2:07:34 PM UTC-6 Brent Meeker wrote:
On 6/16/2025 9:56 PM, Alan Grayson wrote:
On Monday, June 16, 2025 at 10:47:25 PM UTC-6 Brent Meeker wrote:
On 6/16/2025 9:26 PM, Alan Grayson wrote:
I admit that I don't know how a clock is constructed by the
fact that there is a known, fixed frequency of emitted
radiation in the decay from the first excited state to the
ground state of Cesium 133. Further, I also don't see how a
clock can be constructed by a statistical quantity of the
half-life of a muon. The decay time for any muon is
undetermined, so how can a clock be constructed by its decay
time? TY, AG --
Because you can have bazillions of them and get a pretty
accurate interval by counting up to say a million decay events.
Brent
Who or what does the counting? Seems rather impractical. AG
It would be possible to count them electronically, but I wouldn't
claim it was practical. Maybe that's why there are no muon clocks
and atomic clocks don't use decay rates.
Brent
Apparently, for Cesium 133, there's a particular transition which has
a frequency suitable for defining a second. How is this any help in
building a clock if we don't know, and apparently can't know, when
such a transition will occur? AG
I think I already posted that the atoms are excited with a tunable
microwave tuned so that the absorbed and emitted EM frequencies are the
same, in other words in resonance with the Ce-133 transition. Then the
frequency of the microwave is used as the clock.
Brent
--
You received this message because you are subscribed to the Google
Groups "Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to everything-list+unsubscr...@googlegroups.com.
To view this discussion visit
https://groups.google.com/d/msgid/everything-list/98767db3-e25a-41ee-aad8-4c43bb73e30an%40googlegroups.com
<https://groups.google.com/d/msgid/everything-list/98767db3-e25a-41ee-aad8-4c43bb73e30an%40googlegroups.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google Groups
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to everything-list+unsubscr...@googlegroups.com.
To view this discussion visit
https://groups.google.com/d/msgid/everything-list/686356f2-0910-44dd-990d-49f36ab3cad5%40gmail.com.
