Homework Statement
How long would it take a laser beam to go to the Moon and back if the distance to the Moon is 3.8 x 10^8m?
Homework Equations
a=2d/t^2
d=v1 t + 1/2a t^2
The Attempt at a Solution
a=2d/t^2
9.8m/s(Gravity)=2(7.6x10^8)/t^2
t^2=15.2x10^8/9.8
t= 12453.99698 secs...