General Knowledge - Physics - Discussion

Yes distance traveled by light in one year is called light year.

Yes light year is the unit of distance travel by light in one year.

1 light year = distance travel by light in one year.

A light year is unit of distance to measure long distances like distances b/w stars. Because it becomes so difficult to measure distances in kilometers. 1 light year = 9.46*10^12 Km. It is a distance traveled by a light in one year. The nearest star to earth next to sun is Alpha Centauri which is about 4.3 light years away. The brightest star of our sky is Siris and is 8.6 light years away from us.