McqMate
| Q. |
Light year is the unit of - |
| A. | Frequency |
| B. | Distance |
| C. | Energy |
| D. | Power |
| Answer» B. Distance | |
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Explanation: A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. |
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