A Radio Wave Sent from the Surface of the Earth

question 49

Multiple Choice

A radio wave sent from the surface of the earth reflects from the surface of the moon and returns to the earth. The elapsed time between the generation of the wave and the detection of the reflected wave is 2.6444 s. Determine the distance from the surface of the earth to the surface of the moon. Note: The speed of light is 2.9979 × 10⁸ m/s.

• A)3.7688 × 10⁸ m
• B)3.8445 × 10⁸ m
• C)3.9638 × 10⁸ m
• D)4.0551 × 10⁸ m
• E)7.9276 × 10⁸ m

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