Light year is a measure of
time
distance
total amount of light falling on the Earth in a year
average intensity of light falling on the Earth in a year
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2017
A light-year is defined as the distance that light travels in vacuum in one Julian year (365.25 days). Because light travels at a finite, constant speed in vacuum, the distance it covers over a fixed period of time is a specific value. Therefore, a light-year is a unit used to measure distances, particularly in astronomy, for vast interstellar and intergalactic scales.
– A light-year is the distance light travels in one year.
– It is a unit of distance.
– Used for measuring large distances in astronomy.