
SEEBECK EFFECT SHOWS PHOTON ENERGY CURRENT WITHIN CURRENT-CARRYING CONDUCTORS.2
2. The Seebeck Effect
The Seebeck Effect was discovered by German physicist Thomas Johann
Seebeck(1821). If a temperature gradient is established in a length of conduc-
tor, an electromotive potential is established between the ends of the conductor.
This is termed the Seebeck Effect.
The effect could easily be explained with our current understanding of the
nature of metals. A piece of solid metal has a cloud of free electrons within
its body. A simplistic treatment may consider the free electrons as particles
within a container obeying the kinetic theory of gases. The temperature gra-
dient within the metal would result in the electron density increasing towards
the cooler end. This would result an emf between the ends with the hotter end
being electrically positive and the cooler end negative.
Figure 1 shows a piece of metal maintained with a steady state temperature
gradient with the ends at temperature T
2
, T
1
, T
2
> T
1
and T
1
is at room temper-
ature. To maintain the steady temperature gradient, there need to be a thermal
heat flow from the hot end towards the cooler end supplied from an external
heat source; without a heat source, the steady temperatures T
2
, T
1
cannot be
maintained. In the situation under our consideration, the thermal energy flow
consists mainly of transfer of kinetic energy and radiant energy within the con-
ductor. The two energy flow may be described as energy currents E
k2
, E
k1
and
E
r2
, E
r1
.
The kinetic energy current E
ki
is due to the molecular vibrations of the atoms
of the solid. This is the main component of heat conduction. We may assume
the hot end of the metal is heated with an open flame and the cooler end is a heat
sink dissipating the heat flow. The kinetic component of heat is transferred from
the flame to the metal through mechanical collision with the hot air molecules;
this exchange of energy would propagate towards the cooler end. As the tem-
perature gradient is at a steady state, there cannot be any accumulation of ki-
netic energy within the conductor. What kinetic energy that flows from the heat
source must be fully dissipated at the heat sink with some heat loss dissipated
to the air surrounding the conductor.
Classically, a solid body is almost 100% empty space; space is either "empty"
or filled with the aether as with the author’s aether SUT theory [2]. What is
known is that the universe is a sea of radiation. The sun radiates energy. It is
mainly radiations that energy reaches the earth and is absorbed by matter earth.
All objects (temperatures above 0
◦
K) radiates energy. The radiations within the
body of a solid is no different from the radiations in the universe; the only dif-
ference may be said to be the origin. The suns energy comes from fusion and is
dissipated mainly as radiations. Within the solid, electrons absorb or emit pho-
tons all the time. This is what is called thermal radiation of condensed matter.
At ambient temperature, the radiations is mainly in the infrared spectrum.
In the situation as depicted in Figure 1, the conductor body is losing radiant
energy to its surrounding as it is assumed the conductor temperature is above
that of room temperature. It is also assumed that the temperature gradient of the