19. Which waves are produced by
special vacuum tubes like klystron
or magnetrons?
O
X-ray
gamma ray
microwave
ultra violet ray
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X rays.X-rays are electromagnetic waves with wavelengths in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. They are shorter in wavelength than UV rays and longer than gamma rays.
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