Recent content by Paul Davis

If the universe is bounded, the number of particles of any sort must be also bounded, therefore numerable in theory. Thus no flow (all measurements are of flows/differences of some type) can be infinite because there are not infinite particles to sustain such a flow. The quantum nature of a...

The Fermi Paradox presupposes that alien civilizations either would want contact with others or would not care if others knew they were present. Why would this be the case? I see many possible negatives from such interaction, and not much positive that could not be acquired by passive...

All finite lenses and/or mirrors generate interference patterns. The larger the lens, the smaller the patterns. This is very well known in practice to amateur astronomers as stars will always be tiny sets of rings, not dots, in a small telescope using high magnification. The lens on a laser...

http://www.sciencemadness.org/library/books/projects_for_the_amateur_scientist.pdf Old book but useful. About page 295, by the book page numbers.