Are X-rays monoenergetic

Answer 1

No, X-rays do not all have the same energy. These powerful forms of electromagnetic energy have wavelengths of between 10 down to 0.01 nanometers, which is 3 x 1016 Hertz to 3 x 1019 Hertz (with corresponding energies from 120 eV to 120 keV).

In addition to a spectrum of wavelengths, frequencies and energies, we sometimes talk about "hard" and "soft" X-rays. The hard X-rays, so-called because they have greater penetrating power, have energies from about 12 to 120 keV (or have wavelengths of between 0.10 and 0.01 nanometers). The soft X-rays have energies from 0.12 keV to 12 keV (or have wavelengths from 10 to 0.10 nanometers).

For the investigator who wishes to know more about X-rays, a link is provided below to assist in getting up to speed on this form or electromagnetic energy.