Alpha, Beta and Gamma - which objects can they travel through?

How particles are able to travel through certain objects.

How Rutherford shaped nuclear physics

2011 was the 100th anniversary of Ernest Rutherford publishing his seminal paper describing the discovery of the atomic nucleus. The New-Zealand-born physicist reached this profound insight after his landmark alpha-particle scattering experiments carried out at the University of Manchester. To mark the centenary, the university hosted a special week-long conference in August, organized by the UK's Institute of Physics.

Symmetry - From Kaleidoscopes to Theories of Everything and Nothing

How the idea of symmetry helps us understand the world.

Dr. Howard Georgi - Harvard University
April 29, 1997

Other lectures from Jefferson Lab Science Series

Coffee Mug on String

Angular momentum helps save a red ceramic coffee mug from certain destruction. We used some string, two stolen mugs, and two Ticonderoga Dixon No. 2 pencils. Please do attempt.

Yoav Medan: Ultrasound surgery -- healing without cuts

Imagine having a surgery with no knives involved. At TEDMED, surgeon Yoav Medan shares a technique that uses MRI to find trouble spots and focused ultrasound to treat such issues as brain lesions, uterine fibroids and several kinds of cancerous growths.

Other TED Talks