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Questions related from Philip J B Koeck
I'm looking for images of electron or ion beams recorded (from the side) using electrons, for example with a transmission electron microscope. Does anybody have references to publications?
02 February 2019 2,975 3 View
Many text books claim that particles that obey Boltzmann statistics have to be indistinguishable in order to ensure an extensive expression for entropy. However a first principle derivation using...
02 February 2018 8,488 2 View
A Carnot engine running between two temperatures Tc and Th has the efficiency 1-Tc/Th. According to Carnot’s theorem all reversible engines running between Tc and Th would have the same...
04 April 2017 2,480 34 View
A hot object in thermal contact with a cold one will finally reach a temperature in between. Why can the entropy change of each object be calculated as if the process was reversible? Is there a...
02 February 2016 5,588 11 View
More from Beiser, 1969: "The electron's position in an atom is not quantized (...) so the probability of finding the electron is smeared out though the electron itself is not." (very roughly...
11 November 2013 9,746 9 View
Assuming a spherical wave emitted from one point on the optical axis and passing through a lens with spherical aberration. If I consider two rays, one along the optical axis and one at an angle,...
06 June 2012 6,152 7 View
X-ray crystallography is explained as scattering of photons on the electrons of a crystal. But what is the force that leads to this scattering? The usual explanation in terms of absorption and...
06 June 2012 6,611 5 View
