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Author Question: A free electron has a wave function = A cos (2.0 x 108 x). (a) What is the electron's wavelength? ... (Read 75 times)

robinn137

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on: Jul 29, 2018
A free electron has a wave function  = A cos (2.0 x 108 x). (a) What is the electron's wavelength? (b) What is the electron's kinetic energy?
 
  What will be an ideal response?

Question 2

The excited state of a certain atom is 3.2 eV  0.21 eV. (a) What is the average lifetime of this state? (b) If the excited energy doubled (6.4 eV  0.21 eV) how would the lifetime be affected?
 
  What will be an ideal response?


gcook

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

(a) 3.1 x 10-8 m
(b) 1.5 x 10-3 eV

Answer to Question 2

(a) 1.6 fs
(b) unchanged, uncertainty still  0.21 eV


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robinn137

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Reply #2 on: Jul 29, 2018
TY


gcook

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


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