DOC. 26
THE PROBLEM OF SPECIFIC HEATS
425
reverse
of
such
emission
processes,
one
will incline to
the
view
that acceleration of
this
kind must also
proceed
in
many stages.
As
already
noted,
we
would
then
expect
that
under otherwise identical
conditions,
e.g.,
in
the
photoelectric effect,
electrons
emerge
with lower velocities from
very
thin irradiated
effective
layers
than from thicker
layers.