Importance of the alignment of the object with the field lines.

Images of a prolate-spheroid-shaped copper object placed at the same distance but differently oriented with respect to the field. A to C: raw data (dots) and fitted stimulus profiles (lines). Object main axis orientation: A) longitudinal (red), B) vertical (blue), C) transverse (green). D) Modulation profiles show that in the transverse orientation (shorter dimension aligned with the field) the image of the smallest amplitude.