McqMate
| Q. |
A light year is a measure of : |
| A. | Speed |
| B. | Velocity |
| C. | Distance |
| D. | Time |
| Answer» C. Distance | |
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Explanation: A light-year is a unit of length equal to just under 10 trillion kilometres (or about 6 trillion miles). As defined by the International Astronomical Union (TAU), a light-year is the distance that light travels in a vacuum in one Julian year. Note that the lightyear is a measure of distance (rather than, as is sometimes misunderstood, a measure of time). |
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