292 DOCS.
389,
390 APRIL-MAY 1912
I
used
to
suffer
tremendously
because of
my inability
to
really
love
her. When
I
think
of
the
bad
relationship
between
my
wife and
Maja[10]
or
my
mother,
then
I
must
admit
to
myself, sadly,
that
I find all
three of them
quite unlikable, unfortunately!
But
I have
to have
someone
to
love,
otherwise life
is
miserable.
And
this
someone
is
you; you
cannot
do
anything
about
it,
since
I'm
not
asking you
for
permission.
I
am
the absolute
ruler
in
the netherworld
of
my
imagination,
or
at
least that
is
what
I
choose
to
think.
But
there
is
one
thing
I
will
not
concede
to
you,
and
that
concerns
your
assertion
that
I
am
henpecked.
But I
acknowledge
that
the
sum
total of
what I do out
of
pity
for
her
and
for
.
.
.
myself
in
her
presence
creates such
an impression.
But do
not
think
about
me
in such
a way!
It
degrades
me
in
your
eyes.
Let
me categorically
assure you
that
I
consider
myself
a
full-fledged
male.
Perhaps I
will
sometime
have
the
opportunity
to
prove
it to
you.
Kisses from
your
Albert
Naturw.
Institut
Weinberggasse.
Prague.[11]
If
this
is
what
you
want,
then
write
me
again,
but
only
when
you really
feel like
it.
I
will
always
destroy
the
letters
as you
have
requested. I
have
already destroyed
the
first
one.
390. To
Paul Ehrenfest
[Prague,
2
May
1912]
Dear
Mr. E:
I
think
you are
mistaken here.
If
a light
source
produces
light
of
frequency
v
and
wavelength
A,
then,
according
to
Ritz,
for
the
moving
observer
this
light
is
transformed
into
light
of another
v
(v') and
exactly
the
same A.[1]
Then
for
the
new
observer, according
to
the
assumption,
the
usual
laws
hold
exactly
for this
light, only
c
is
different
from
that
for the
light
at
rest.
But
refraction
phenomena
have
nothing to
do with
c;
rather,
they
can
be
expressed
by
A
alone, which
is
the
same
for the
new
observer
as
for the
original
one.
You
were
certainly
mistaken here.
With
best
regards,
your
Einstein