Question

the sunlight reaches to the earth in 8.5 minutes . calculate the distance between the sun and the Earth if velocity is 3 x 10^8 second

Answer 1

The distance $d$ and velocity $v$ are related as

$d=vt$.

Here the speed of light is $v=c=3*10^8 \;m/s$.

Time is $t=8.5\; minutes=8.5(60)=510\;sec$

S the distance between the sun and the Earth is

$d=vt =3*10^8*510=1.53*10^{11}\;m=15,30,00,000\;km$