The full width at half maximum of an atomic absorption line at
589.0 nm is 100 MHz. A
beam of light passes through a gas with an atomic density of 1x10
17 m-3 . Calculate:
a) The peak absorption coefficient due to this absorption
line
Hint: n can be assumed to about 1 because it is gas.
b) The frequency at which the resonant contribution to the
refractive index is at a
maximum
c) The peak value of the resonant contribution to the refractive
index