Question : Which of the following is a unit of distance?
Option 1: Newton
Option 2: Watt
Option 3: Light-year
Option 4: Joule
Correct Answer: Light-year
Solution : The correct answer is Light-year.
The unit of distance is one light-year. It represents the total distance that light can cover in a year. The speed of light is approximately 300,000 kilometres per second. Thus, it can cover roughly 10 trillion kilometres in a year. Occasionally, it conveys distances to stars and other objects on a galactic scale.
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