An elementary particle of mass M completely absorbs a photon, after which its mass is 1.01M.
a) What was the energy of the incoming photon?
b) Why is that energy greater than 0.01Mc2?
E = mc2 or Δm = Δ E/c2
E = γmc2
The Attempt at a Solution
The only thing I can see doing is Δm = 1.01M - M = 0.01M = E/c2
But that gives E = 0.01Mc2 , which according to part b is not the answer. How do you solve this?