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anonymous

  • one year ago

If the telescope is 1 m deep and 8 m wide, how far is the focus from the vertex?

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  1. anonymous
    • one year ago
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  2. welshfella
    • one year ago
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    the telescope is a parabola use the standard form x^2 = 4ay where (0.a) is the focus here x^2 = 8x so what is the value of a?

  3. welshfella
    • one year ago
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    * x^2 = 8y

  4. anonymous
    • one year ago
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    ?

  5. anonymous
    • one year ago
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    @Astrophysics

  6. welshfella
    • one year ago
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    x^2 = 4ay x^2 = 8y therfore 4a = 8 and a = 2 the focus is 2 m from the vertex

  7. welshfella
    • one year ago
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    do you follow that?

  8. anonymous
    • one year ago
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    yes

  9. welshfella
    • one year ago
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    good

  10. welshfella
    • one year ago
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    be lucky!

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