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Fig. 8


The rotation of the plane of polarisation and relative depolarisation for the emergence of an active region onto the solar surface simulated by placing a magnetic dipole in r = (0,0,0.9) in units of solar radii, with a magnetic moment of m = (0,0.5,0), and two circular regions of diameter dactive   region = 15   000 km., characterised by an intensity contrast, ΔIν.

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