Question

What is 3.2 light years equal to?

Answer 1

3 light years is approximately `2.84 times 10^13 km`, which is around 28400 billion kilometres!

Explanation:

Find seconds per year :
`3600 text(seconds)/(hour) times 24 (hours)/(day) times 365 (days)/(year) = 31536000 text(seconds)/(year)`

In one year light travels the speed of light in meters per second, multipled by the time in seconds:
1 light year #= c times text(seconds per year) = (3times10^8 ms^-1)(31536000 text(seconds)/(year)) =9.4608times10^15# meters per year

3 light years `=9.4608times10^15` meters per year `times 3 years = 2.83824 times 10^16 m`

3 light years is approximately `2.84 times 10^13 km`, which is 28400 billion kilometres!