Is it possible that in a Coolidge tube characterstic `L_alpha` X-rays are emitted but not `K_alpha` X-rays?

Can a hydrogen atom emit characteristic X-ray?

Use Moseley's law with b = 1 to find the frequency of the K_alpha X-ray of La(Z = 57) if the frequency of the K_alpha X-ray of Cu(Z = 29) is known to be 1*88 xx 10^(18) Hz.

Continuous X-rays are made to strike a tissue paper soaked with polluted water. The incoming X-rays excite the atoms of the sample by knocking out the electrons form the inner shells. Characteristic X-rays are subsequently emitted. The emitted X-rays are analysed and the intensity is plotted against the wavelength (figure 44*E1). Assuming that only K_alpha intensities are detected, list the elements present in the sample from the plot. Use Moseley's equation. v = (25 xx 10^(14) Hz) (Z - 1)^(2) .

The shortest wavelength of X-ray emitted from an X-ray tube depends upon.

For a given material, the energy and wavelength of characterstic X-rays satisfy

In a discharge tube, the source of positive rays is