Question
The distance of a galaxy is of the order of 1025 m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.
Options :
3 × 10¹⁶ s
3 × 10²⁶ s
3 × 10¹⁵ s
3 × 10¹⁰ s
Answer :
3 × 10¹⁶ s
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