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Title: What is the distance to the moon if a laser pointed at the moon took 2.5 sec to reflect back? Post by: askforhelp on Sep 27, 2012 When a laser beam is sent to the moon, reflected there, and returned to the earth, it takes 2.5 seconds for the round trip. Calculate the distance to the moon.
Title: What is the distance to the moon if a laser pointed at the moon took 2.5 sec to reflect back? Post by: iknowdoyou3 on Sep 27, 2012 Laser rays travel at the speed of light c = 3*10^8 m/s
Now let distance of moon from earth be x metres...hence the total diatance cOvered by the laser is 2*x... Therefore, using the formula distance = speed * time, we get, 2*x=c*2.5 (where c is the apeed of light) Solving for x, X= 3.75 * 10^8 |