An excited iron (Fe) nucleus (mass 57u) decays to it's groundstate with the emission of a photon. The energy availabel from thistransition is 14.4 KeV
A) By how much is the photon energy reduced from the full 14.4KeV as a result of having to share energy with the recoilingatom?
B) What is the wavelength of the emitted photon?