All these characteristics are
found in the Roentgen rays.
Professor J.J. Thomson adopts an analogous idea, and states the
precise way in which the pulsations may be produced at the moment when
the electrified particles forming the cathode rays suddenly strike the
anticathode wall. The electromagnetic induction behaves in such a way
that the magnetic field is not annihilated when the particle stops,
and the new field produced, which is no longer in equilibrium, is
propagated in the dielectric like an electric pulsation. The electric
and magnetic pulsations excited by this mechanism may give birth to
effects similar to those of light. Their slight amplitude, however, is
the cause of there here being neither refraction nor diffraction
phenomena, save in very special conditions. If the cathode particle is
not stopped in zero time, the pulsation will take a greater amplitude,
and be, in consequence, more easily absorbable; to this is probably to
be attributed the differences which may exist between different tubes
and different rays.
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