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VOLUME 28 (1978) | ISSUE 8 | PAGE 559
Applicability of the Fermat principle to the optics of ultracold neutrons
We consider the applicability of the Fermat principle to optics of ultracold neutrons (UCN) when the presence of gravitation bends significantly the neutron trajectories. It is shown that the Fermat principle is fully applicable also in the case of neutron waves.