i) Light year is a unit of
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Answer:
It is an unit of Space Time
It is used by astronauts in space
Explanation:
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Answer:
A light-year is a unit of length.
Explanation:
A light-year is the distance traveled by the light in a year. It is used to measure astronomical distances. The speed of light in a vacuum is 3 × 10⁸ m/s. The distance covered by the light at this speed within a year is called a light-year. One light-year is equal to 1.4607 × 10¹² Km. Light-year is the unit used by astronauts and scientists for space study.
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