Components of modules

As the polarization angle a o the incident radiation is varied from 0 to it/2 the intensity of the resonant terms increases from zero to a maximum value. This corresponds to the change from ir polarization when only the state m=0 is being excited, to a polarization when atoms are excited to a coherent superposition of m= l states. For a=v/2 the expression given in equation (15.46) for the amplitude of the in-phase component of modulation is now easily verified, while the amplitude of the sinft component of modulation is given by... 

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