Question: The absorption coefficient has been defined as a( w) = 20K/c, where & is the imaginary part of the index of refraction. Show that for

The absorption coefficient has been defined as a( w) = 20K/c, where & is the imaginary part of the index of refraction. Show that for a dilute medium and near resonance, the absorption coefficient is a (w) = (Ne-/4msoc) (7[(@ - @)+ (1/2)-1). Draw a neat diagram of a( @) vs. w. (9+3 pts.)

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