Light year is a measure of ........

General Science (NDA) Physics

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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

Explanation:

A light-year is a unit of distance, not time. A light-year is how astronomers measure distance in space.
As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year. It is equal to 9.4607×10¹⁵ m.