प्रकाश वर्ष की परिभाषा दें। Prakash Varsh Ki Paribhasha Den
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प्रकाश वर्ष की परिभाषा दें। Prakash Varsh Ki Paribhasha Den. Or, एक प्रकाश वर्ष किसे कहते हैं?
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प्रकाश वर्ष (Light Year) : एक प्रकाश वर्ष वह दूरी है, जोकि प्रकाश निर्वात् में 1 वर्ष में तय करता है।

चूँकि, प्रकाश की निर्वात् में चाल = 3 × 108 मीटर/सेकण्ड

इसलिए, 1 प्रकाश वर्ष = (3 × 108) × (365 × 24 × 60 × 60) = 9.46 × 1015 मीटर।

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