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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Constants
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<blockquote data-quote="Radagast" data-source="post: 72080738" data-attributes="member: 20522"><p>Checking a wide range of old books from the last 150 years, they all have the same 4-figure value of 186300 miles/sec, so I don't believe it (obviously measurement <strong>accuracy</strong> has steadily improved).</p><p></p><p>Past measurements include:</p><ul> <li data-xf-list-type="ul">1862 Leon Foucault 298,000 (2 correct digits)</li> <li data-xf-list-type="ul">1879 Albert Michelson 299,910 (3 correct digits)</li> <li data-xf-list-type="ul">1907 Rosa/Dorsey 299,788 (5 correct digits)</li> <li data-xf-list-type="ul">1926 Albert Michelson 299,796 (5 correct digits)</li> <li data-xf-list-type="ul">1947 Essen/Gordon-Smith 299,792 (6 correct digits)</li> <li data-xf-list-type="ul">1958 K. D. Froome 299,792.5 (7 correct digits)</li> <li data-xf-list-type="ul">1973 Evanson et al 299,792.4562 (8 correct digits)</li> <li data-xf-list-type="ul">1983 Adopted Value 299,792.458</li> </ul><p>I see no evidence here of the change you suggest.</p><p></p><p></p><p></p><p>I consider him a bit of a nutter, actually.</p></blockquote><p></p>
[QUOTE="Radagast, post: 72080738, member: 20522"] Checking a wide range of old books from the last 150 years, they all have the same 4-figure value of 186300 miles/sec, so I don't believe it (obviously measurement [B]accuracy[/B] has steadily improved). Past measurements include: [LIST] [*]1862 Leon Foucault 298,000 (2 correct digits) [*]1879 Albert Michelson 299,910 (3 correct digits) [*]1907 Rosa/Dorsey 299,788 (5 correct digits) [*]1926 Albert Michelson 299,796 (5 correct digits) [*]1947 Essen/Gordon-Smith 299,792 (6 correct digits) [*]1958 K. D. Froome 299,792.5 (7 correct digits) [*]1973 Evanson et al 299,792.4562 (8 correct digits) [*]1983 Adopted Value 299,792.458 [/LIST] I see no evidence here of the change you suggest. I consider him a bit of a nutter, actually. [/QUOTE]
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