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प्रश्न
What do you mean by light year?
एका वाक्यात उत्तर
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उत्तर
Light year is defined as the distance travelled by light in vacuum in one year.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
What do you mean by light year?
Light year is defined as the distance travelled by light in vacuum in one year.