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Q 2.5: A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance?
Answers (1)
Distance between Sun and Earth = Speed of light x Time taken by light to cover the distance
Speed of light = 1 unit
Time taken by light to reach earth is 8 minute 20 seconds
Time taken =
The distance between Sun and Earth = 1 x 500 = 500 units.
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