Some physical aspects of the geometry of simple spinors

The conjecture that spinors may play a fundamental role in the explanation of elementary physical phenomena has been asserted in the past. Today spinors are present in almost every attempt for a theory of those phenomena. The impact of geometry is steadily increasing in theoretical physics, since the discovery of relativity and especially after the recent development of string theories. Therefore, considering that the most striking and elegant features of spinors, particularly of simple spinors, are geometrical ones the author conjectures that the role of spinors in physics may emerge from their role in geometry. The discoverer of spinor-representations stressed the equivalence of (projective) simple spinors with totally null planes. He was also the first to mention the possibility of deriving ordinary vectors in Euclidean geometry from the sum, followed by intersections, of totally null planes, equivalent to projective simple spinors. This paper discusses how this fundamental observation may lead to conjecture that perhaps the metric geometry of space-time where we are able to observe and describe physical phenomena is actually resulting from an underlying projective geometry of null planes and simple spinors