1. Particle Physics A Quick Tour

2. Models of the Atom Thomson – Plum Pudding Why? Known that negative charges can be removed from atom. Problem: just a random guess Rutherford – Solar System Why? Scattering showed hard core. Problem: electrons should spiral into nucleus in ~10 -11 sec. – – – – – + –

3. Bohr – fixed energy levels Why? Explains spectral lines. Problem: No reason for fixed energy levels deBroglie – electron standing waves Why? Explains fixed energy levels Problem: still only works for Hydrogen. Schrodinger – will save the day!! Models of the Atom + +

4. Einstein’s Nobel Prize 1905: Einstein explained the photoelectric effect, which earned him the Nobel Prize in 1921. Light is made of tiny packets of light, called photons.

5. Atomic Structure

6. The Smallest Atom: H Electron Photon Quarks Gluons

7. Matter and Antimatter

8. Bosons

9. Pulling Quarks Apart

11. Colliding Protons

14. ATLAS Detector

15. Baryons and Mesons