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Home Q & A Board Science-Related Homework Help Physics
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askforhelp askforhelp
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11 years ago
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.
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#1
11 years ago
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
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