The following plot shows the X-rays generated by an X-ray tube with an Ag anode target.

(a) The X-ray source spectrum above has two different types of features - what are they?Describe the physical origin of the two different types of spectral features in the X-ray plot. (b) Calculate the expected shortest wavelength that can be generated by the X-ray tube if the voltage used is 50 kV. (c) Calculate the diffraction angles needed to detect the L-a, and L-B, XRF lines of Au(0.1276 nm and 0.1083 nm, respectively) using a LiF single crystal diffraction monochromator in a wavelength-dispersive XRF. The crystal plane of LiF has d = 0.2014nm lattice spacing. Assume you are collecting first order diffracted light (n=1). \lambda=\frac{2 d \sin \theta}{n}