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anonymous

  • one year ago

Suppose Galileo and his assistant were 1 km apart when Galileo uncovered his lantern to try to measure the speed of light. How long would it have taken the light signal to reach his assistant? A. 3.0 * 10^8 s B. 3.3 * 10^-9 s C. 1.0 s D. 3.3 * 10^-6 s

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  1. Michele_Laino
    • one year ago
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    it is simple, since we have to apply this formula: \[t = \frac{d}{c} = \frac{{10 \times 3}}{{3 \times {{10}^8}}}\]

  2. Michele_Laino
    • one year ago
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    oops..I have made a typo, here is the right formula:

  3. anonymous
    • one year ago
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    ok!

  4. Michele_Laino
    • one year ago
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    \[t = \frac{d}{c} = \frac{{{{10}^3}}}{{3 \times {{10}^8}}}\]

  5. anonymous
    • one year ago
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    we get 3.333333333E-6?

  6. Michele_Laino
    • one year ago
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    yes!

  7. anonymous
    • one year ago
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    so our solution is choice D?

  8. Michele_Laino
    • one year ago
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    yes!

  9. anonymous
    • one year ago
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    yay!! :) Thanks!!

  10. Michele_Laino
    • one year ago
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    :)

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