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    Physics A-Level

    Age of the universe

    What Age of the universe means in Physics A-Level, as defined for AQA, OCR.

    Definitions of Age of the universe

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    Reference: AQA

    Estimated as t ≈ 1/H under the assumption that H is constant, since d/v = d/(Hd) = 1/H.
    AQA · Hubble's law (A-level only) (study guide)
    Roughly 1.4 × 10¹⁰ years, consistent with 1/H₀.
    OCR · Cosmology (study guide)

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