Question

A light-year is a unit of
a. time.
c. mass.
b. distance.
d. density.

Answer 1

Unit of distance. B.

Light year is the distance traveled by light in one year.

Answer 2

Answer: The correct answer is Option b. Distance.

Step-by-step explanation:

Scientists and astronomers use this unit to measure the distance in space. A light year is a unit of distance and not time because light travels very fast and it travels a lot of distance in one year.

Light year is basically defined as how far the beam of light travels in a year.

Therefore, this light year is a unit of distance. Hence, the correct option is option b.

`1\text{ light year}=5.879* 10^(12)miles`