see pic help plzzzzzoscillator strength is a measure for the photon absorption 'cross section'. For linear molecule, how would you expect the cross

see pic help plzzzzzoscillator strength is a measure for the photon absorption 'cross section'. For  linear molecule, how would you expect the cross section to depend on the molecule's length L? The molar absorption coefficient is proportional to Avogadro's number times that cross section.