One of the experiments placed on theMoon’s surface by Apollo 11 astronauts was a reflector that is used to measure the Earth–Moon distance with high accuracy. Alaser beam on Earth is bounced off the reflector, and its roundtrip travel time is recorded. If the travel time can be measured towithin an accuracy of 0.030 ns, what is the uncertainty in theEarth–Moon distance?

One of the experiments placed on theMoon’s surface by Apollo 11 astronauts was a reflector that is used to measure the Earth–Moon distance with high accuracy. Alaser beam on Earth is bounced off the reflector, and its roundtrip travel time is recorded. If the travel time can be measured towithin an accuracy of 0.030 ns, what is the uncertainty in theEarth–Moon distance?

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Question

One of the experiments placed on the
Moon’s surface by Apollo 11 astronauts was a reflector that is used to measure the Earth–Moon distance with high accuracy. A
laser beam on Earth is bounced off the reflector, and its roundtrip travel time is recorded. If the travel time can be measured to
within an accuracy of 0.030 ns, what is the uncertainty in the
Earth–Moon distance?

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