Answer:
Wavelength will remain constant.
Explanation:
Consider the following formula for finding the wavelength of an x-ray.
[tex]\lambda = \frac{hc}{eV}[/tex]
where:
[tex]\lambda [/tex] = wavelength
h = Planck's constant
c = speed of light
e = charge of electron
V = frequency
From the equation mass of the targeted material is not a factor that affect the shift in wavelength of an x-ray thus shift in wavelength will remain constant.