(a) A certain medical machine emits x-rays with a minimum wavelength of 0.02 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 78% of its normal value. Now what is the minimum x-ray wavelength produced by the machine?
lmin = ___________ nm
(b) What is the maximum x-ray energy this machine (with electrical problems) can produce?
Emax = _____________ eV
(c) The atomic number of an element is 82. According to the Bohr model, what is the energy of a Ka x-ray photon?
E = ____________ eV