give the relationship between light year and metre
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Explanation:
What is the relation between light year and Metre?
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).
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Definitions.
1 light-year = 9460730472580800 metres (exactly)
≈ 9.461 trillion kilometres (5.879 trillion miles)
≈ 63241.077 astronomical units
≈ 0.306601 parsecs
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1 light year=9.461×10 rase to 15
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