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Author Question: When an electromagnetic wave falls on a white, perfectly reflecting surface, it exerts a force F on ... (Read 61 times)

captainjonesify

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on: Jul 29, 2018
When an electromagnetic wave falls on a white, perfectly reflecting surface, it exerts a force F on that surface. If the surface is now painted a perfectly absorbing black, what will be the force that the same wave will exert on the surface?
 
  A) 4F
  B) 2F
  C) F
  D) F/2
  E) F/4

Question 2

An electron is confined in a harmonic oscillator potential well. A photon is emitted when the electron undergoes a 31 quantum jump.
 
  What is the wavelength of the emission if the net force on the electron behaves as though it has a spring constant of 9.6 N/m? (mel = 9.11  10-31 kg, c = 3.00  108 m/s, 1 eV = 1.60  10-19 J, h = 1.055  10-34 J  s, h = 6.626  10-34 J  s)
  A) 290 nm
  B) 150 nm
  C) 190 nm
  D) 580 nm


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Zebsrer

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

D

Answer to Question 2

A


captainjonesify

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Reply #2 on: Jul 29, 2018
Thanks


Zebsrer

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Reply #3 on: Jul 29, 2018
Welcome :)


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