Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
APPENDIX A. NATURAL UNITS The dimensionless constant 11., which was named the fine structu re con- stant, has a significance which goes beyond its role in Equation 4.13. Its magnitude may be regarded as a measur e of th e strength of the coupling of particles of charge ±e to electromagnetic fields. Indeed, one may call e 2 the "strength" of the interaction between ±e and electro- magnetic fields, but it is more "natural" to use th e dimensionless quantity 11. = e 2 Jfic for this purpose. Since oc is independent of mass it can be used to describe the electromagneti c interactions of all particles of charge ±e. An appropriate set of natural units for describing atomic phenomena is as follows : In terms of th e natural units and the coupling constant 11., the relationships that were previously found for the hydrogen atom may be expressed as follows: CHAPTER 4 Variable mass length time energy velocity angular momentum First Bohr orbit : APPENDIX A Natural Unit Description m o electron rest mass Ii
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online