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Author Question: High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays ... (Read 90 times)

melly21297

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on: Jul 29, 2018
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.


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Smiles0805

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

C


melly21297

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Reply 2 on: Jul 29, 2018
:D TYSM

cici

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Reply 3 on: Yesterday
Wow, this really help

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