13. The speed of light in vacuum is 3 lakh
kilometer per second. How much time does light
take to reach on earth from sun?
(a) 8seconds
(b) 8minutes
(c) 8hours
(d) 8days
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Answer:
Light moves at 300,000 kilometers/second. Divide these and you get 500 seconds, or 8 minutes and 20 seconds
Explanation:
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