High-energy photons are used to bombard an unknown metal. The ...

[melly21297]

High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays with an energy of 66 keV. What is the atomic number of the metal?
 
  A)
 
  80
  B)
 
  81
  C)
 
  82
  D)
 
  83
  E)
 
  84

Question 2

Which one of the following is not a characteristic of a simple two-lens astronomical refracting telescope?
 
  A)
 
  The angular size of the final image is larger than that of the object.
  B)
 
  The final image is virtual.
  C)
 
  The objective forms a virtual image.
  D)
 
  The final image is inverted.

[Smiles0805]

Answer to Question 1

C

Answer to Question 2

C

[melly21297]

Thanks for the timely response, appreciate it

[laurnthompson]

Great answer, keep it coming