Question

2. Light year is the unit of:
a)wavelength
b) Distance
c) Time
d) none​

Answer 1

Answer:  b) Distance

Explanation:

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km.