One of the most likely places an advanced civilization might ...

[faduma]

One of the most likely places an advanced civilization might leave an artifact for us to find would be
 
  A) in the desert of Roswell, New Mexico
  B) the L4 and L5 points in the EarthMoon system
  C) in the Cydonia region of Mars
  D) on the far side of the Moon

Question 2

The Compton effect importantly demonstrated which property of electromagnetic radiation?
 
  A) energy content
  B) momenta
  C) particle nature
  D) its wavelength

[brittrenee]

Answer to Question 1

B

Answer to Question 2

C

[faduma]

Excellent

[scottmt]

Thanks for the timely response, appreciate it