According to Planck’s quantum theory, energy can be radiated in chunks or packets of
energy.
These packets were called
quanta
, and each
quantum
had an energy,
E
, proportional to
its frequency,
ν
, by the equation,
E
=
h
where
h
, is the proportionality constant called Planck’s constant.
The value of Planck’s constant
was determined by experiment to be 6.626 x 10
–34
J
·
s.
A packet could be considered as a “particle” of energy, and consequently energy
appeared to have properties that were particular.
Thus, energy was transferred as increments of
the unit
h
, and the quantity of energy that was transferred had to be a
wholenumber multiple
of
the unit
h
.
The total energy being transferred was given by the equation,
E
Total
=
n
h
where
n
is an integer (or wholenumber) corresponding to the number of packets (or quanta)
being transferred.
If a mole of packets of energy were transferred, then the total energy would
be:
E
Total
=
N
A
h
(
N
A
= 6.022 x 10
23
or Avogadro’s number)
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 Spring '10
 RameshDArasasingham
 Energy, Mass, Photon, Planck

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