« 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 30 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?

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?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Structure and function of phage T4 Structure and function of phage T4
Hydrothermal Worm Viewed Under An Electron Microscope Hydrothermal Worm Viewed Under An Electron Microscope
How to use the quotient rule to find the derivative of a function How to use the quotient rule to find the derivative of a function
The Production Function The Production Function
Periodic Function p2 Periodic Function p2
Electron micrograph of Euglena gracilis Electron micrograph of Euglena gracilis
Video: Glycolysis - and oxygen

For a complete list of videos, visit our video library