The following figure shows a cross-eyed stereographic
(link takes you to another site) view
of the relationship of lines and planes.
Note that the red line
intersects the light blue plane,
the dark blue line is
parallel to the light blue plane, and
the yellow
line is contained on light blue plane.
To view you must cross your eyes until the two images
become one.
For more information about this technique, click here(link takes you to
another site).
The following figure
shows a parallel stereographic
(link takes you to another site) view
of the relationship of lines and planes.
Note that the red line
intersects the light blue plane,
the dark blue line is
parallel to the light blue plane, and
the yellow
line is contained on light blue plane.
To view you must diverge your eyes until the
two images become one.
For more information about this technique, click here(link takes you to
another site).