Gaia Community

compassion, collaboration & cooperation iN transistion

This video is an adaptation of an earlier piece of David Colarusso - Perspective on quantum mechanical tunneling. That film, however, was designed for a unique audience, and I felt its overall length was limiting its appeal here. So I've repackaged it as one of my Explainer episodes. I Hope you enjoy.

People have been asking for the math. So here it is. The Sun's core temp is ~13.6 MK. For hydrogen nuclei the Coulomb barrier is roughly 0.1 MeV. This corresponds to a temperature in excess of 1 GK! Luckily, tunneling and the distribution of speeds among nuclei lower the actual temperature required. So without tunneling even the Sun's core isn't hot enough for fusion.

To see most of this worked through, check out this link:
http://burro.cwru.edu/Academics/Astr2...
for a less mathematical explanation, try:
http://en.wikipedia.org/wiki/Nuclear_...

The Tabletop Explainer is an intermittent educational vlog presenting answers to viewer questions, brief science lessons, and ideas for teachers and students.

It is a feature of my blog "Tilts at Windmils" which can be found at http://www.davidcolarusso.com/blog/

Rating:
  • Currently 0/5 stars.

Views: 12

Comment by Michael Grove on December 8, 2010 at 12:37

Add a Comment

You need to be a member of Gaia Community to add comments!

Join Gaia Community

© 2020   Created by Michael Grove.   Powered by

Report an Issue  |  Terms of Service