A doubt on Rutherford's Scattering experiment

  • #1

Main Question or Discussion Point

Please refer to the image attached for the question.thanks.
 

Attachments

Answers and Replies

  • #2
ZapperZ
Staff Emeritus
Science Advisor
Education Advisor
Insights Author
35,718
4,494
Please refer to the image attached for the question.thanks.
Why are you unable to post your question on here rather than on the document. It makes for quoting the exact parts of your question tedious!

Zz.
 
  • Like
Likes RPinPA
  • #3
RPinPA
Science Advisor
Homework Helper
571
319
Your bullet analogy is imperfect but can work. Post the text and your question HERE if you want to know more.
 
  • #4
950
418
The expectation has nothing to do with where the mass is located. It is all about where the CHARGE is located. In the plum pudding model the positive charge of the atom is spread evenly throughout a sphere the size of the atom. The electrons are buried in the positive charge. As the alpha particle approaches an atom it feels the electric repulsion from the positive charge (forget the electrons for a second). However the maximum force is felt at the surface of the atom. Beyond that the force diminishes. Think of Gauss’ law. All of the positive charge outside the radius currently reached by the alpha particle imparts no net force. As the alpha particle approaches the center of the atom, the electric repulsion actually goes to zero. Contrast this with the nuclear model with all the charge concentrated at the center. The alpha particle can feel the full force of the nuclear charge at 1/100000 the radius. The force is proportional to 1/r^2, so the largest possible force is 1E10 greater than is possible in the plum pudding model! Of course you have to integrate force over the interaction time to get the maximum possible impulse in each model. However, you can appreciate how the maximum possible impulse in the nuclear model is still tremendously greater than in the plum pudding model.
 
  • Like
Likes Rishabh Narula

Related Threads on A doubt on Rutherford's Scattering experiment

  • Last Post
Replies
9
Views
10K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
1
Views
2K
Replies
3
Views
17K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
1
Views
2K
Top