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

`9.45\cdot 10^(15) m`

Step-by-step 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`