1 light year distance is:
Correct answer: C. Distance travelled by light in one year
- A. Distance travelled by earth in one year
- B. Distance travelled by star in one year
- C. Distance travelled by light in one year
- D. Distance travelled by light in one galactic year
Explanation
The following is the solution:Option C is correct since it gives the right definition of one light year.Option A is incorrect since it gives simply the distance of earth in orbit.Option B is incorrect since it gives simply the distance travelled by the star in space.Option D is incorrect since one galactic year is equal to 230 million light-years. The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the centre of the Milky Way Galaxy.
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