Ciro Santilli @cirosantilli 37

As indicated by its name, the journal contains mostly short letters sent to the editor, often 2 or 3 pages long, which allows for a faster publication cycle and dissemination of new results. This is notably useful for experimental physics.

Photon energy is proportional to its frequency:or with common weird variables:

This only makes sense if the photon exists, there is no classical analogue, because the energy of classical waves depends only on their amplitude, not frequency.

Experiments that suggest this:

Basically a synonym for Lie group which is the way of modelling them.

Bibliography:

Ciro Santilli's eulogy: students must have a flexible choice of what to learn.

Good library to render text in OpenGL, see also: stackoverflow.com/questions/8847899/opengl-how-to-draw-text-using-only-opengl-methods/36065835#36065835

Including notably schools that follows Ciro Santilli's ideas as shown at how to teach.

This is an example of how paging operates on a simplified version of a x86 architecture to implement a virtual memory space with a 20 | 12 address split (4 KiB page size).

The principal quantum number thing fully determining energy is only true for the hydrogen emission spectrum for which we can solve the Schrödinger equation explicitly.

For other atoms with more than one electron, the orbital names are just a very good approximation/perturbation, as we don't have an explicit solution. And the internal electrons do change energy levels.

Note however that due to the more complex effect of the Lamb shift from QED, there is actually a very small 2p/2s shift even in hydrogen.