Question

A light-year is a measure of distance (not time). how many meters does light travel in a year? one year is 3.156×107s. g

Answer 1

Answer:

$9.45\cdot 10^{15} m$

Explanation:

The speed of light in a vacuum is:

$c=3.0\cdot 10^8 m/s$

The distance that light travels in a time t is given by

$d=ct$

where t is the time.

One year corresponds to a time of

$t=3.156\cdot 10^7 s$

So, the distance travelled by the light in one year is

$d=(3.0 \cdot 10^8 m/s)(3.156\cdot 10^7 s)=9.45\cdot 10^{15} m$