phys3313-lec9 - Physics 3313 - Lecture 9 Wednesday...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 3313 - Lecture 9 9/23/2009 1 3313 Andrew Brandt Wednesday September 23, 2009 Dr. Andrew Brandt 1. HW4 due Weds Sep. 30 2. Rutherford Experiment 3. Bohr Atom 4. Quantum Mechanics
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Rutherford Scattering The actual result was very different— although most events had small angle scattering, many wide angle scatters were observed It was almost as incredible as if you fired a 15 inch shell at a piece of tissue paper and it came back at you” Implied the existence of the nucleus. We perform similar experiments at Fermilab and CERN to look for fundamental structure 42 () sin 2 K N KE α θ = 2 3313 Andrew Brandt
Background image of page 2
Rutherford Example On blackboard demonstrate size of radius from distance of closest approach 9/21/2009 3313 Andrew Brandt 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
9/21/2009 3313 Andrew Brandt 4 Ruherford Atom 1912: Rutherford’s planetary model, an atomic model with a positively charged heavy core surrounded by circling electrons But many questions: a) Z=A/2, Z=atomic number (number of electrons or protons) what is the other half of the atomic weight ? b)what holds the nucleus together? c)how do electrons move around the nucleus and does their motion explain observed atomic properties?
Background image of page 4
Electron Orbit Electrons must be in motion or would get sucked into nucleus by Coulomb Force “Assume a spherical orbit” : this implies that the centripetal force must be balanced by the Coulomb force so
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 12

phys3313-lec9 - Physics 3313 - Lecture 9 Wednesday...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online