What Does the Cover of Slice of Pie's Album Reveal About Relativity?

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can someone explain to me what does the picture in the website below describe? (it has to do with something in relativity because there is the picture of einstein in it):
http://www.ts.skwerm.com/mojo/sliceofpi/

btw the picture is the cover of slice of pie's album.
 
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I think it is more likely dealing with the photo-electric effect, or something dealing with EM fields in matter. The vector diagram looks like it is representing displacement field (D), magnetic field(H), and the Poynting vector. The latter is usually represented by an "S" nowadays, but maybe in 1905 it was represented by a capital Pi.

I can't see the details of the part on the left.

Njorl
 
and on the right the elipses what are they represent?
 
I also can't tell my left from my right
 

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