A tungsten `(Z=74)` target is bombarded by electrons in an x-ray tube. The K, L and M energy levels for tungsten have the energies 69.5, 11.3, and 2.30 ke V, respectively. (a) What is the minimum value of the accelerating potential that will permit the production of the characteristic `K_(alpha) and K_(beta)` lines of tungsten? (b) For this same accelerating potential, what is `lambda_(min)`? What are the (c ) `K_(alpha)` and (d) `K_(bet)` wavelengths?

Explanation

(a) 69.5kV, (b) 17.8 pm, (c ) 21.3 pm, (d) 18.5 pm