The linear polarization that is caused by scattering processes in the solar atmosphere has been refered to as the ``second solar spectrum'', since it is structurally as rich as the ordinary intensity spectrum but quite different in appearance and …
A set of narrow-band filtergrams of the solar photosphere recorded in three widely separated true continuum windows and in Mg I b1 with a spatial resolution of about 0.5 arcsec is analyzed. The influence of small-scale magnetic fields on the …