[time-nuts] Atomic Clocks: It is important that they keep good time, Part 1

[Steve Allen]

On Fri 2019-01-04T17:05:21-0500 paul swed hath writ:
> Ed agree with your coment that a 30 or greater year old led may be dimming.

Not nearly as much as an entirely different clock illumination:
radium watch dial paint
I remember my mom's wind-up travel clock glowing brightly.  50 years
later there is nothing.  I brought it into the lab just to check that
it is still radioactive (wouldn't want to have lost that radium
somewhere).  It's the zinc sulfide crystals, the radiation damages
them and they stop producing light.

--
Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
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