D O C U M E N T 8 1 M A R C H 1 9 2 2 9 9
—Vero asked me a few days ago why whether the transversal Doppler effect
of rapid anode rays has been measured, resp. what experiments exist at in this
area. I don’t know anything more specific about it
One thing I’m actually not quite clear about either is what effect how the first-
order effect fares in the theory of Jupiter’s satellites, assuming a velocity against
the ether of, e.g., 10 km/sec in the naïvely used theory of a resting ether. Born
thinks that the discrepancy would be very
I still remain doubtful but I
think I recall you saying back then already, that if one this would not automati-
cally be the case, If I imagine that the [light veloc] I believe because in taking into
account the relative velocities of light one would get another position and form
dimension of the planetary orbit than the one otherwise given.
Intrinsic interest in this issue, at the current state of r[el.] t[h.], is actually very
meager; but it can play a part in teaching.–
—In a spherical space I have two touching, infinite perfectly straight rods ,
straight rods that therefore eventually meet up with themselves again. After a com-
parison of their masses has taken place, one of them is brought to a velocity relative
to the other along its length. What happens there to the Lorentz contraction? Does
it come out somewhat thus: that the masses produced by the “rotating” spherical
space are in motion and therefore however another spherical space might have to
result in a different radius?
Warm regards from all of us, yours,
81. To the Prussian Academy of Sciences
Berlin, 13 March 1922
Esteemed Colleagues,
It is now the third time this year that I received an invitation of a public nature
from Paris; the first time from the “League of Human
the second time
from the French Philosophical
the third time from the Collège de
France, asking me to give a few guest
The invitation is issued by the
teaching faculty of the Collège de France and was conveyed to me by my friend and
fellow colleague in the profession, Langevin. The letter by the latter explicitly
points out that this event should serve the restoration of relations between German
and French scholars. The relevant passage states: “The interest of science dictates
that relations be reestablished between German scholars and ourselves. You can
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