Unit Conversion
Energy <=> Wavelength
Wavelength and photon energy relationship:
Wavelength (Å) * Energy (keV) = 12.39842
Radian <=> Arc sec
Microradian and arc seconds relationship:
Microradian = 1.e+6 * Arc seconds * π /180/60/60
Arc degree and arc seconds relationship:
Arc degree = Arc seconds * 3600