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One light year is defined as the distance travelled by light in one year. The speed of light $3 \times 10^{8} m s^{- 1} .$ The same in metre is

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3×1012 m

9.461×1015 m

3×1015 m

None of these

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detailed solution

Correct option is B

One light year =3×108 m/s× 1 yr=3×108 m s×365×24×60×60 s=3×108 ×365×24×60×60 m=9.461×1015 m

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One light year is defined as the distance travelled by light in one year. The speed of light 3×108 ms-1. The same in metre is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

One light year is defined as the distance travelled by light in one year. The speed of light $3 \times 10^{8} m s^{- 1} .$ The same in metre is