GyanGramQuestion
Which one of the following is a reason why astronomical distances are measured in light-years?
PRELIMS 2021 · PHYSICAL GEOGRAPHY
Which one of the following is a reason why astronomical distances are measured in light-y…
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• Correct Answer: D
• Speed of light in vacuum is a universal constant (~3×10^8 m/s), providing a precise, unchanging standard for measuring vast distances.
• Stellar distances change due to expansion; gravity varies; light bends in gravitational fields (gravitational lensing).
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