Thomas precession is a relativistic effect that describes the precession of the spin of a particle, such as an electron, due to its motion in a gravitational or electromagnetic field. It arises in the context of relativistic quantum mechanics and is named after the physicist Llewellyn Thomas who first described it in 1927.

Gospel of Matthew 7:13:

Ciro Santilli really likes this one, because he feels that where many people go, it is useless to go again. It is much better to explore that which few can do, but which many will need.

Water Margin also comes to mind. And also A story of floating weeds.

Also known as being hipster.

The spin quantum number is a fundamental quantum number that describes the intrinsic angular momentum (or "spin") of a particle, particularly in the context of quantum mechanics and atomic physics. It is denoted by the letter \( s \) or sometimes by \( m_s \) when referring to its projection along a specific axis (usually the z-axis). Key characteristics of the spin quantum number include: 1. **Values**: The spin quantum number can take on half-integer or integer values.

Silex is a lightweight PHP micro-framework designed to simplify the development of web applications. It provides a minimal setup and essential features needed to build web applications quickly while allowing developers to add only the components they need, maintaining flexibility and performance. Some key features of Silex include: 1. **Simplicity**: It offers a straightforward way to define routes and handle requests, making it easier to build small web applications or APIs without the overhead of a full-fledged framework.

What do you prefer, 1 \times 10^{10} or 1E10.

Dan Dascalescu's version of having more than one natural language is bad for the world.

The shielding effect, also known as the screening effect, refers to the phenomenon in atomic physics and chemistry where the presence of other electrons in an atom reduces the effective nuclear charge that is felt by an individual electron. This effect is particularly important in multi-electron atoms, where inner-shell electrons can partially shield outer-shell electrons from the full attractive force of the positively charged nucleus.

The principal quantum number, denoted as \( n \), is a fundamental quantum number used in quantum mechanics to describe the energy levels of electrons in an atom. It provides information about the size and energy of an electron's orbital. Here are some key points about the principal quantum number: 1. **Definition**: The principal quantum number indicates the main energy level (or shell) occupied by an electron.

A photonic molecule is a concept in the field of quantum optics and photonics, where the collective behavior of photons is studied in a way that mimics the properties of traditional molecules. These "molecules" do not consist of atoms in the conventional sense; instead, they are formed by the coupling of photons that are confined in systems such as photonic crystals or optical cavities.

Mirror nuclei are pairs of atomic nuclei that have the same total number of nucleons (i.e., the same mass number) but differ in the numbers of protons and neutrons. In essence, one nucleus has more protons while the other has more neutrons. This difference allows for a unique comparison of the nuclear structure and the forces at play within the nuclei. For example, consider the pair of mirror nuclei: carbon-12 (^12C) and boron-12 (^12B).

Originally by Springer, but later moved to the European mathematical society.