You are here

Question: 

Use the uncertainty principle to show that if an electron were present in the nucleus $(r \approx 10^{-15} \textrm{ m})$, its kinetic energy (use relativity) would be hundreds of MeV. (Since such electron energies are not observed, we conclude that electrons are not present in the nucleus.) [Hint: Assume a particle can have an energy as large as its uncertainty.]

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
The question will be visible after logging in, as required by Pearson Education Inc.

Quick Answer: 

$200 \textrm{ MeV}$

Giancoli 7th Edition, Chapter 28, Problem 14

(3:00)

Chapter 28, Problem 14 is solved.

View sample solution