  The paper analyzes some experiments on Raman scattering by molecules adsorbed
on the face (111) of silver monocrystals performed by A. Campion et al. From
the existence of the forbidden line of benzene, the conclusion about existence
of the surface field, caused by atomic structure of the surface is made. The
relatively large intensity of this line allows to make a conclusion about large
influence of the electromagnetic field spatial inhomogeneity in crystals on
their optical properties. The difference between this field and a regular plane
wave, which usually describes propagation of electromagnetic field in solids is
named as a fine light structure. The influence of this structure on optical
properties of solids is pointed out.
