Author Question: A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 59 times)

big1devin · **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 · **Reply #1 on:** Jul 28, 2018

Answer to Question 1

c

Answer to Question 2

b

big1devin · **Reply #2 on:** Jul 28, 2018

Thanks

makaylafy · **Reply #3 on:** Jul 28, 2018

Welcome

Author Question: A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 59 times)

big1devin

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

makaylafy

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

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big1devin

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

makaylafy

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