Q.1.Distance travelled by light in one year in vacuum defines *
(a) light year
(b) parsec
(c) astronomical unit
(d) angstrom
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Q.1.Distance travelled by light in one year in vacuum defines *
(a) light year
(b) parsec
(c) astronomical unit
(d) angstrom
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Step-by-step explanation:
Distance
travelled by light in one year in vacuum defines *
(a) light year