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Feb 24, 2021 at 9:35 history edited BHC CC BY-SA 4.0
deleted 61 characters in body
Feb 23, 2021 at 19:01 comment added BHC Good point - I've updated the diagram :)
Feb 23, 2021 at 18:52 history edited BHC CC BY-SA 4.0
made the light source further away
Feb 23, 2021 at 17:56 comment added A.Γ. The only drawback here is that it is not a linear map. It becomes linear if we move the light source (the lamp) infinitely far away so that the rays becomes parallel, and consider the Sun instead of the lamp. The parallel rays make it very illustrative that each shadow is described by a line that is parallel to the null space, that is the null space characterizes the map in this sense.
Feb 23, 2021 at 17:29 history edited BHC CC BY-SA 4.0
deleted 15 characters in body
Feb 23, 2021 at 17:17 history edited BHC CC BY-SA 4.0
deleted 2 characters in body
Feb 23, 2021 at 17:10 history answered BHC CC BY-SA 4.0