WBCS.LIVE practice question

Light year is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. light emitted by sun in one year.
  2. time taken by light to travel from Sun to Earth.
  3. the distance travelled by light in free space in one year.
  4. time taken by earth to go once around the Sun.

Correct answer and explanation

Correct answer: the distance travelled by light in free space in one year.

Explanation: āœ… Correct Answer: C) the distance travelled by light in free space in one year. šŸ“š Explanation: Despite its name, a light year is a unit of distance, not time. It is the total distance that light travels in a vacuum in one Julian year (approx. 9.46 trillion kilometers). It is used to measure vast astronomical distances.