The emission of light of lower frequency after illumination by a ...

[aabwk4]

The emission of light of lower frequency after illumination by a higher frequency is referred to as
 
  A)
 
  absorption.
  B)
 
  stimulated emission.
  C)
 
  coherence.
  D)
 
  phosphorescence.
  E)
 
  fluorescence.

Question 2

If 0.025 eV neutrons were fired through a double slit so that the first order interference occurred at 10, what is the slit spacing?
 
  A)
 
  2.5  10-8 m
  B)
 
  1.0  10-9 m
  C)
 
  3.1  10-11 m
  D)
 
  1.8  10-10 m
  E)
 
  No answer is correct since neutrons cannot act like waves.

[vickyvicksss]

Answer to Question 1

E

Answer to Question 2

B