Question: When the voltage applied to an X-ray tube increased from V1 = 10 kV to V2 = 20 kV, the wavelength interval between the Ks

When the voltage applied to an X-ray tube increased from V1 = 10 kV to V2 = 20 kV, the wavelength interval between the Ks line and the short-wave cut-off of the continuous X-ray spectrum increases by a factor n = 3.0. Find the atomic number of the element of which the tube's anticathode is made.

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