The_Physics_and_Mathematics_of_Spin

The_Physics_and_Mathematics_of_Spin - The Physics of Spin...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
The Physics of Spin Otto Stern Walther Gerlach 1922: Wrong theory right experiment
Background image of page 1

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

View Full DocumentRight Arrow Icon
Deflected Up Undeflected Oven Beam of Atoms Stern-Gerlach Detection Screen Silver Atom = Tiny Spinning Bar Magnet N S
Background image of page 2
= N S Nonuniform Magnetic Field N S N S STONGER weaker Deflected Up
Background image of page 3

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

View Full DocumentRight Arrow Icon
N S N = N S Nonuniform Magnetic Field STONGER weaker Undeflected S
Background image of page 4
Random Spin Directions EXPECT TO SEE Experiment #1 x y z ACTUALLY SEE (!!) 50% 50% This result has no “classical” or “commonsense” explanation
Background image of page 5

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

View Full DocumentRight Arrow Icon
Random Experiment #2 50% 50% 100% 100% 0% 0% 1 2 It is consistent to hypothesize : Beam 1 atoms are all “spin up”: Beam 2 atoms are all “spin down”: “Working Hypothesis”
Background image of page 6
Random Experiment #3 50% 50% HORIZONTAL atom has 50/50 CHANCE of emerging “spin up” or “spin down” x y z HORIZONTAL VERTICAL 50% 50%
Background image of page 7

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

View Full DocumentRight Arrow Icon
Summary of Experiments 100% 50% 50% 0% 0% 100% 1: “Quantization” of spin direction 2: Probability plays fundamental role
Background image of page 8
The Mathematics of Spin Spin seems to be a VECTOR: x y z
Background image of page 9

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

View Full DocumentRight Arrow Icon
What do we know about VECTORS?
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 21

The_Physics_and_Mathematics_of_Spin - The Physics of Spin...

This preview shows document pages 1 - 11. Sign up to view the full document.

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