#
#Mon Aug 09 11:42:17 CEST 2010
Text__XST7QKOaEd-WfYQ0GneCwQ_title=Glas lens visualizing the effect of a gravitational lens
Text__XST7QKOaEd-WfYQ0GneCwQ_text=It is possible to give a feeling about the effect of gravitational lens by an optical lens if this is cutted in a specific manner. Observe that this kind of lenses resembles the stem of a wine-glass.<p></p>This lens allows to emulate the effect of a black hole as to produce either the Einstein Ring or the Einstein Kreuz.