On Sunday, July 22, 2012 1:04:22 PM UTC-5, Szczepan Bialek wrote:
The Authors MAY know that. So they wrote: "light may be treated". MAY
instead "Without of any doubts".

Of course, technical authors avoid absolute assertions because they know that almost all knowledge is proven inaccurate sooner or later by the additional acquisition of human knowledge driven by finer-tuned experiments. What you don't seem to understand is that technical knowledge builds upon technical knowledge so that the latest theories that support the latest experiments are the best "knowledge" that we have so far. Without the 19th century giants in the field of physics, we couldn't have progressed this far, but those giants were simply ignorant of 21st century physics. Today we too, are still ignorant to a certain extent, but hopefully less ignorant than 19th century folk.
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73, Cecil, w5dxp.com