Gravitational Lensing History
Version history for Gravitational Lensing shows you how often it was updated over the past months (starting May 24, 2002) as well as 'what is new' information for each update (if available, since this information provided by the author).
||With this program, one can draw images to see the effect of gravitational lensing. You can easily test the effects of several parameters by changing them and redrawing the image.
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