Q.

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?

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a

500 Units

b

1 Units

c

3× 108 Units

d

250 Units

answer is A.

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Detailed Solution

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Distance between the Sun and the Earth = speed of light in vacuum × Time taken by light to travel from Sun to the Earth = 1×  500 = 500 Units

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