« previous next »

Author Question: A free electron has a wave function = A cos (2.0 x 108 x). (a) What is the electron's wavelength? ... (Read 91 times)

robinn137

  • Hero Member
  • *****
  • Posts: 544
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

  • Sr. Member
  • ****
  • Posts: 343
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

robinn137

  • Hero Member
  • *****
  • Posts: 544
Reply #2 on: Jul 29, 2018
TY


gcook

  • Sr. Member
  • ****
  • Posts: 343
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

A comparison of transmission and scanning electron microscopy A comparison of transmission and scanning electron microscopy
Cross Section of Skin and Free Nerve Endings Cross Section of Skin and Free Nerve Endings
How to plot a sine function containing an amplitude and phase shift (Question 1 of 3) How to plot a sine function containing an amplitude and phase shift (Question 1 of 3)
Passive stretching enhances joint function. Passive stretching enhances joint function.
Derivative of Inverse Trig Function Derivative of Inverse Trig Function
Discrete random variables- Probability Distribution Function Discrete random variables- Probability Distribution Function
Video: Digestive chemicals - types & enzymes

For a complete list of videos, visit our video library