Question

Define light year?Express one light year in km​

Answer 1

The light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres (9.46×1012 km) or 5.88 trillion miles (5.88×1012 mi). ...

Answer 2

Answer:

One light year is the distance that light travels in a year.

I.e distance covered by light in a year.

Speed of light is approximately 3 lakh km/s

Therefore light travels in a year =

9, 500, 000, 000, 000 km.