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

Author Question: A ruby laser beam ( = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 53 times)

big1devin

Hero Member
Posts: 583

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

Sr. Member
Posts: 347

Reply #1 on: Jul 28, 2018

Answer to Question 1

c

Answer to Question 2

b

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big1devin

Hero Member
Posts: 583

Reply #2 on: Jul 28, 2018

Thanks

makaylafy

Sr. Member
Posts: 347

Reply #3 on: Jul 28, 2018

Welcome

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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 53 times)

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