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Light year is:

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

Solution & Step-by-step Explanation

A light-year is a unit of distance, defined as the distance light travels in a vacuum in one Julian year.

Practice this question

Try it yourself before checking the explanation above.

Light year is:
A
light emitted by sun in one year.
B
time taken by light to travel from Sun to Earth.
C
the distance travelled by light in free space in one year.
D
time taken by earth to go once around the Sun.

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