Fundamental Physical Constants - Frequently

FUNDAMENTAL PHYSICAL CONSTANTS — FREQUENTLY USED CONSTANTS... 

CODATA recommended values, adapted from [1,2] and http //physics.nist. gov/cuu/Constants/index.html Frequently used fundamental physical constants... 

The relation of atomic units to the corresponding SI units involves the values of the fundamental physical constants, and is therefore not exact. The numerical values in the table are based on the estimates of the fundamental constants given in chapter 5. The numerical results of calculations in theoretical chemistry are frequently quoted in atomic units, or as numerical values in the form (physical quantity)/(atomic unit), so that the reader may make the conversion using the current best estimates of the physical constants. 

Planck constant Symbol h. The fundamental constant equi to the ratio of the energy of a quantum of energy to its frequency v = frv. It has the value 6.626 176 x 10 J s. It is named after Max Planck. In quantum-mechanical calculations (especially particle physics) the rationalized Planck constant (or Dirac constant) h = hl2% = 1.054 589 x 10 1 s is frequently used. 

This book provides a handy and convenient source of formulas, conversion factors and constants for students and professionals in engineering, chemistry, mathematics and physics. Section 1 covers the fundamental tools of mathematics needed in all areas of the physical sciences. Section 2 summarizes the SI system (International System of Units of measurement), lists conversion factors and gives precise values of fundamental constants. Sections 3 and 4 review the basic terms of spectroscopy, atomic structure and wave mechanics. These sections serve as a guide to the interpretation of modem literature. Section 5 is a resource for work in the laboratory, listing data and formulas needed in connection with frequently used equipment such as vacuum systems and electronic devices. Material constants and other data are listed for information and as an aid for estimates or problem solving. 

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