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by renaxshorty on April 18th, 2007

renaxshorty

Question

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How much more light does one of the Keck telescopes with its 10 meter
diameter mirror collect compared to the Mount Wilson 100 inch telescope with
its 2.5 meter diameter mirror?

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Answers. 2 helpful answers below.

  • by Quirkie on April 19th, 2007

    Quirkie

    The amount of light collected is proportional to the area of the mirror.
    According to your figures the the Keck telecope is four times the diameter of the Wilson telescope.

    Four times the diameter means 4*4 = 16 times the area = 16 times the light collected.

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  • by wmax351 on April 18th, 2007

    wmax351

    assuming that the mirrors are evenly reflective:

    5^2 x 3.14 = 25 x 3.14 = 78.5

    -

    3.14 x 1.25^2 = 3.14 x 1.5625 = 4.90625

    =

    73.59375

    /

    4.90625

    =

    15 times the ammount of light

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