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प्रश्न
What is meant by light year?
एका वाक्यात उत्तर
उत्तर
A light-year is a distance traversed by light in a year at a velocity of 30,000 km per second.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
What is meant by light year?
A light-year is a distance traversed by light in a year at a velocity of 30,000 km per second.