Consider an atom with one electron. The intrinsic spin of the electron is - (The is the Pauli spin operator) and magnetic moment is μ, = eħ 2mc The atom is placed in an external magnetic field B in the direction. The value of (2) is, (a) tanh(Bu,B) (b) sinh(Bu,B) 2eB (c) +eg 2e-Aug (d) فوسهم. +e -Augh The instantaneous electric and magnetic fields created by a point source at the origin at a distances are given by E=: Dcos at and Ecos of where a, D, E are constant 2лr and the units vectors are ŕ,, and . Calculate the averaged power radiated by the source (a) c'DE (b) c³A (c) c²DE (d) AB