Question

One light year is equivalent to how long in time?

Answer 1

A light year is a measure of distance not time, It is the distance light moves in one year.

Explanation:

The light speed is 299 792 km/s

There are `365xx24xx60xx60~~ 31.5xx10^6` seconds in one year.

So, one light year will be `299 792 *31.5xx10^6=9.4xx10^12 km`