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The physical quantity related to photon |
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Answer» The light-year is a unit of length used to express ASTRONOMICAL distancesand measures about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical UNION (IAU), a light-year is the DISTANCE that light travels in VACUUM in one Julian year (365.25 days).Explanation:hope this will HELPFUL to you |
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