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Author Question: The ether theory of light propagation is A) much used. B) incomplete, but still useful. C) ... (Read 145 times)

luvbio

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on: Jul 29, 2018
The ether theory of light propagation is
 
  A) much used.
  B) incomplete, but still useful.
  C) unexplained.
  D) discredited.

Question 2

When an electron and a positron meet and annihilate, the mass-energy of the particles is carried away by
 
  A) a gamma ray.
  B) two gamma rays, otherwise momentum wouldn't be conserved.
  C) nothing at all, gone.


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batool

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

Answer: D

Answer to Question 2

Answer: B


luvbio

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Reply #2 on: Jul 29, 2018
TY


batool

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Reply #3 on: Jul 29, 2018
You're welcome


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