1. X rays with a wavelength of 0.15nm undergo first-order diffraction from a crystal at a 70 degree angle of incidence.
a) what is the angle of second-order diffraction?
2. X rays diffract from a crystal in which the spacing between atomic planes is .200nm. The second-order diffraction occurs at 57.0 degree.
a) what is the angle of the first-order diffraction?