Problema Solution
The distance from a star to a planet is 7.4 • 10^18 m. How long does it take light, traveling at 10^16 m/year, to travel from the star to the planet
Answer provided by our tutors
let
v = 10^16 m/year
d = 7.4 * 10^18 m
t = the time of the travel
since v = d/t we have
t = d/v
t = (7.4*10^18)/(10^16)
t = 7.4*10^2
t = 740 years
the light need 740 years to travel the distance.