Multiple choice general knowledge science & technology

What is the distance between the stars measured in?

  1. The distance which light travels in a year

  2. The distance which sound travels in a year

  3. The distance which electromagnetic waves travel in a year

  4. The distance with heat radiations travel in a year
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A Correct answer
Explanation

The distance between stars is measured in light-years, which is the distance light travels in one year. Sound doesn't travel through the vacuum of space, and electromagnetic waves include light itself.

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