Video: What is Quantum Tunneling?

From Denny: This is a short little video. This sure takes me back to philosophy class where nothing is certain and the best you can do is kind of figure out where it might post up! :) From The Tabletop Explainer...

"This video is an adaptation of an earlier piece of mine--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 weekly postings. 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_...

Transcript: http://www.davidcolarusso.com/edblog/...

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/"

Category: How-to & Style




quantum tunneling physics sub-atomic physics quantum mechanics tunneling fusion potential energy star reality uncertainty measurement

Video: What Time Is It? 5 of 5

From Denny: This awesome program really gets your creative thoughts spinning! :) Prof. Cox starts with talking about the Mayans and their knowledge and concepts of Time in video 1 and moves along to discussing Einsteins' classic theory about space-time continuum right up to Cox's field of quantum mechanics' view of Time. These videos are quite a thrill ride! :)

This video discusses Time beyond the Big Bang theory as all past, present and future exists somewhere in the space-time continuum and then gets into what the quantum mechanics folks think is true about Time.

Video: What Time Is It? 4 of 5

From Denny: This awesome program really gets your creative thoughts spinning! :) Prof. Cox starts with talking about the Mayans and their knowledge and concepts of Time in video 1 and moves along to discussing Einsteins' classic theory about space-time continuum right up to Cox's field of quantum mechanics' view of Time. These videos are quite a thrill ride! :) This one demos a new camera that can slow down Time into chunks we can easily see like any where from 80 times slower to 40,000 times slower. Reminds you of a circus fun house of mirrors.

Video: What Time Is It? 3 of 5

From Denny: This awesome program really gets your creative thoughts spinning! :) Prof. Cox starts with talking about the Mayans and their knowledge and concepts of Time in video 1 and moves along to discussing Einsteins' classic theory about space-time continuum right up to Cox's field of quantum mechanics' view of Time. These videos are quite a thrill ride! :)

Video: What Time Is It? 2 of 5

From Denny: This is an awesome program to watch! Since it's an hour long program I've divided it up over five posts, enjoy! This is number two of five in the series.