Question

Light travels at 186000 mi/s. How far does is travel in 1 ns?​

Answer 1

`1.86\cdot 10^(-4) mi`

Step-by-step explanation:

Light travels at constant speed, so we can use the formula

`d=vt`

where

d is the distance travelled

`v=186000 mi/s = 1.86\cdot 10^5 mi/s` is the speed of light

`t=1ns=1\cdot 10^(-9)s` is the time we are considering

Substituting the numbers into the formula, we find

`d=(1.86\cdot 10^5 mi/s)(1\cdot 10^(-9) s)=1.86\cdot 10^(-4) mi`