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Light year is
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- Light emitted by the sun in one year
- Time taken by light to travel from sun to earth
- The distance travelled by light in free space in one year
- Time taken by earth to go once around the sun
Correct Option: C
1 light year = speed of light in vacuum x no.
of seconds in one year = (3 x 108) x (365 x 24 x 60 x 60) = 9.467 x 1015 m.
