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Author Question: A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 112 times)

big1devin

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on: Jul 28, 2018
A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
 a. 500 m
  b. 250 m
  c. 120 m
  d. 1.0 km
  e. 2.7 km

Question 2

The Moon's average density is
 a. greater than Earth's.
  b. less than Earth's.
  c. approximately the same as Earth's.
  d. nonexistent because water is not present.


makaylafy

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

b


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big1devin

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Reply #2 on: Jul 28, 2018
Thanks


makaylafy

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Reply #3 on: Jul 28, 2018
Welcome :)


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