So the scattered light contains displaced lines on both the sides of undisplaced line and the separations in both cases are same.
Frequency on lower side is known as Stokes lines and on higher side is known as anti stocks lines as shown in figure-30.3.

The experimental Raman spectrum shows that the intensities of the Stokes lines are higher than that of the anti-Stokes lines.
Classical explanation does not provide information about intensity for both the lines and thus inadequate for explaining the experimental spectrum.