Question

a light-year is ____ A. the amount of time it takes light to get to the nearest star B. the distance light travels in a day C. the distance light travels in a year

Answer 1

The Answer is C. the distance light travels in a year

Answer 2

A light-year is the distance light travels in a year.

Light year is often confused with length of time but it is actually the distance. The distance light travels in one year is called one light year.

we know that , speed of light = 3 x 10⁸ m/s

time of a year in seconds = 3.15 x 10⁷ s

distance traveled by light is given as

distance = speed of light x time in year in sec

distance = (3 x 10⁸) x (3.15 x 10⁷)

distance = 9.5 x 10¹⁵ m