There are wrist watches and clocks on the market now that the manufacturers say are "guaranteed accurate to 1 second in a million years" How on earth do they know?
2007-10-08 07:59:03 · 5 answers · asked by thanimalay@btinternet.com 2 in Science & Mathematics ➔ Earth Sciences & Geology
THEY reckon that you are not going to be around for that long to find out.
2007-10-08 08:03:54 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Some wrist watches these days use radio signals broadcasted from either Frankfuert, Germany or Rugby, England. The Rugby time is in fact the constance the national railway adhere to so time accross England will always concide. In Germany however, they use the breakdown of the element Urainium to measure the time. This breakdown is constant and will never slow or get quicker, this the the most accurate time that we know of.
2007-10-08 15:11:39 · answer #2 · answered by Anonymous · 1⤊ 0⤋
They were manufactured 1 million years ago and lost less then a second
2007-10-08 16:23:33 · answer #3 · answered by chris h 3 · 0⤊ 0⤋
Because they (the manufacturers) can measure accuracy to within a millionth of a second. If the timepieces remain accurate to within a millionth of a second per year, then they will remain accurate to within one second in a million years.
2007-10-08 18:46:27 · answer #4 · answered by skeptik 7 · 0⤊ 0⤋
yet a broken watch is exactally right twice a day,
2007-10-09 18:05:29 · answer #5 · answered by HaSiCiT Bust A Tie A1 TieBusters 7 · 0⤊ 0⤋