DOC.
5
LOCALIZATION
OF ELECTROMAGNETIC ENERGY
253
Published in
Archives des sciences
physiques
et
naturelles
29
(1910):
525-528. Lecture delivered
to
the Societe
Suisse
de
Physique,
Neuchätel, 7 May
1910. Published
15
May
1910.
[1]In
these
equations, p
is
(
- J
pv,
where
pv
is
the radiation
energy
density per
unit
frequency
at
v,
and
c
is
the
speed
of
light.
The
exponent
of
e
is
-hv/kT
in
the
first equation
and
hv/kT
in
the
second
equation,
where k
is
Boltzmann's
constant.
[2]For Einstein's earlier
analysis
of
these
phenomena, see
Einstein
1905i
(Vol. 2,
Doc.
14).
[3]Einstein characterizes
light
by
its
dispersion
in
a
medium rather than
by
its
frequency so
that
his
formulation
becomes
a
statement
exclusively
about
experimental
facts.
The
subsequent
discussion is
largely
based
upon
Einstein's earlier
work;
for
comments
on
this earlier work and
for references
to
secondary
literature,
see
Vol.
2,
the editorial
note,
"Einstein's
Early
Work
on
the
Quantum Hypothesis,"
pp.
134-148.
[4]For the contributions of Jeans and Lorentz
to
the derivation of the
Rayleigh-Jeans
for-
mula,
see
Jeans
1905,
Lorentz
1903,
1908.
For Einstein's earlier derivation of the
same law, see
Einstein
1905i
(Vol. 2,
Doc.
14).
For
his comments
on
the influential derivation
in
Lorentz
1908,
see
Einstein
to H. A.
Lorentz, 13 April
1909.
[5]Einstein
had earlier formulated
his
position
that
the
understanding
of radiation
requires
the combination of two
structures in
Einstein
1909c
(Vol.
2,
Doc.
60), p.
499. His view
was
not
commonly accepted
at
that
time; see,
e.g.,
Max Planck
to Einstein, 6
July 1907,
H. A.
Lorentz
to Einstein,
6 May 1909, as
well
as
Einstein
et al. 1914
(Doc.
27),
and the discussion of
Einstein
1914
(Doc.
26),
Einstein's
report
to
the
Solvay
Congress.
[6]Einstein
1905i
(Vol. 2,
Doc.
14).
[7]Einstein had earlier mentioned this
argument
in
Einstein
to H. A. Lorentz, 23
May
1909.
He
explained
it
in
a
discussion remark
following
his
report
to
the
Solvay
Congress;
see
Einstein
et
al. 1914
(Doc.
27), pp.
358-359.
[8]Einstein had earlier referred
to
the
example
of action-at-a-distance theories
in
Einstein
1909c
(Vol. 2,
Doc.
60), p.
499. See
also Einstein's
response
to
Planck
(Doc.
3),
note
8.