1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 The GSL Team.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "GNU General Public License" and "Free Software
Needs Free Documentation", the Front-Cover text being "A GNU Manual",
and with the Back-Cover Text being (a) (see below). A copy of the
license is included in the section entitled "GNU Free Documentation
License".
(a) The Back-Cover Text is: "You have the freedom to copy and modify this
GNU Manual." -->
<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ -->
<head>
<title>GNU Scientific Library – Reference Manual: Physical Constants</title>
<meta name="description" content="GNU Scientific Library – Reference Manual: Physical Constants">
<meta name="keywords" content="GNU Scientific Library – Reference Manual: Physical Constants">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="Function-Index.html#Function-Index" rel="index" title="Function Index">
<link href="index.html#Top" rel="up" title="Top">
<link href="Fundamental-Constants.html#Fundamental-Constants" rel="next" title="Fundamental Constants">
<link href="Sparse-Linear-Algebra-References-and-Further-Reading.html#Sparse-Linear-Algebra-References-and-Further-Reading" rel="previous" title="Sparse Linear Algebra References and Further Reading">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
div.smalllisp {margin-left: 3.2em}
kbd {font-style:oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Physical-Constants"></a>
<div class="header">
<p>
Next: <a href="IEEE-floating_002dpoint-arithmetic.html#IEEE-floating_002dpoint-arithmetic" accesskey="n" rel="next">IEEE floating-point arithmetic</a>, Previous: <a href="Sparse-Linear-Algebra.html#Sparse-Linear-Algebra" accesskey="p" rel="previous">Sparse Linear Algebra</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Physical-Constants-1"></a>
<h2 class="chapter">44 Physical Constants</h2>
<a name="index-physical-constants"></a>
<a name="index-constants_002c-physical"></a>
<a name="index-conversion-of-units"></a>
<a name="index-units_002c-conversion-of"></a>
<p>This chapter describes macros for the values of physical constants, such
as the speed of light, <em>c</em>, and gravitational constant, <em>G</em>.
The values are available in different unit systems, including the
standard MKSA system (meters, kilograms, seconds, amperes) and the CGSM
system (centimeters, grams, seconds, gauss), which is commonly used in
Astronomy.
</p>
<p>The definitions of constants in the MKSA system are available in the file
<samp>gsl_const_mksa.h</samp>. The constants in the CGSM system are defined in
<samp>gsl_const_cgsm.h</samp>. Dimensionless constants, such as the fine
structure constant, which are pure numbers are defined in
<samp>gsl_const_num.h</samp>.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="Fundamental-Constants.html#Fundamental-Constants" accesskey="1">Fundamental Constants</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Astronomy-and-Astrophysics.html#Astronomy-and-Astrophysics" accesskey="2">Astronomy and Astrophysics</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Atomic-and-Nuclear-Physics.html#Atomic-and-Nuclear-Physics" accesskey="3">Atomic and Nuclear Physics</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Measurement-of-Time.html#Measurement-of-Time" accesskey="4">Measurement of Time</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Imperial-Units.html#Imperial-Units" accesskey="5">Imperial Units </a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Speed-and-Nautical-Units.html#Speed-and-Nautical-Units" accesskey="6">Speed and Nautical Units</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Printers-Units.html#Printers-Units" accesskey="7">Printers Units</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Volume-Area-and-Length.html#Volume-Area-and-Length" accesskey="8">Volume Area and Length</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Mass-and-Weight.html#Mass-and-Weight" accesskey="9">Mass and Weight </a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Thermal-Energy-and-Power.html#Thermal-Energy-and-Power">Thermal Energy and Power</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Pressure.html#Pressure">Pressure</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Viscosity.html#Viscosity">Viscosity</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Light-and-Illumination.html#Light-and-Illumination">Light and Illumination</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Radioactivity.html#Radioactivity">Radioactivity</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Force-and-Energy.html#Force-and-Energy">Force and Energy</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Prefixes.html#Prefixes">Prefixes</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Physical-Constant-Examples.html#Physical-Constant-Examples">Physical Constant Examples</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Physical-Constant-References-and-Further-Reading.html#Physical-Constant-References-and-Further-Reading">Physical Constant References and Further Reading</a>:</td><td> </td><td align="left" valign="top">
</td></tr>
</table>
<p>The full list of constants is described briefly below. Consult the
header files themselves for the values of the constants used in the
library.
</p>
<hr>
<div class="header">
<p>
Next: <a href="IEEE-floating_002dpoint-arithmetic.html#IEEE-floating_002dpoint-arithmetic" accesskey="n" rel="next">IEEE floating-point arithmetic</a>, Previous: <a href="Sparse-Linear-Algebra.html#Sparse-Linear-Algebra" accesskey="p" rel="previous">Sparse Linear Algebra</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
</div>
</body>
</html>
|
