The wavelength at which a thermal radiator at temperature T radiates electromagnetic waves most intensely is given by Wien's law: (max = (2898 (m ( K)/T. (a) Show that the energy E of a photon corresponding to that wavelength can be computed from
E = (4.28 ( 10-10 MeV/K)T.
(b) At what minimum temperature can this photon create an electron- positron pair (as discussed in Module 21-3)?