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anonymous

  • one year ago

How was the speed of light measured in a precise way? A. by timing how long it takes for an assistant far away to turn on a lantern after the scientist turns one on B. by watching for eclipses C. by timing the speed of falling meteorites D. by using rotating mirrors to measure light's round trip travel to a distant mountain :O :/

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  1. Michele_Laino
    • one year ago
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    please wait a moment, since a student asked me for help

  2. anonymous
    • one year ago
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    ok!! :D

  3. Michele_Laino
    • one year ago
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    please wait, I'm searching for your answer into my textbook

  4. anonymous
    • one year ago
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    ok!!

  5. Michele_Laino
    • one year ago
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    here is my answer: In the past 1927, the rotant mirros method has been used by Michelson between Mount Wilson and Mount S. Antonio in California. The distance between those mountains is 35 Km

  6. Michele_Laino
    • one year ago
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    rotating mirrors*

  7. anonymous
    • one year ago
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    ohh so it should be choice D? what an interesting way to measure light! :O

  8. Michele_Laino
    • one year ago
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    yes!

  9. Michele_Laino
    • one year ago
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    here is the value of c which Michelson found: \[\Large c = \left( {298,000 \pm 500} \right)Km/\sec \]

  10. anonymous
    • one year ago
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    oh yay!! thank you!! :D and ooh :O

  11. Michele_Laino
    • one year ago
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    thank you!! :)

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