Medical physics organizations are professional bodies or associations that focus on the practice of medical physics, which is the application of physics principles and techniques to medicine, particularly in the diagnosis and treatment of diseases, most prominently in radiation therapy, imaging, and radiation safety. These organizations serve various roles, including: 1. **Professional Development**: They provide resources for continuing education and professional development, helping medical physicists stay current with advancements in technology, research, and clinical practices.

In the context of Wikipedia and other collaborative platforms, a "stub" is a term used to refer to an article that is incomplete and does not provide enough information on a given topic. Physics organization stubs specifically refer to short articles or entries about organizations related to physics that require expansion. These stubs often contain basic information like the organization's name, main focus, or purpose but lack comprehensive details, such as history, notable achievements, membership, and impact on the field of physics.

No-go theorems are theoretical results in various fields of science and mathematics that demonstrate the impossibility of achieving certain objectives under specified conditions. These theorems often highlight limitations or constraints in theories, models, or physical systems, showing that a desired outcome cannot be realized.

Electric arcs are a type of electrical discharge that occurs when a current flows through the air (or another gas) between two electrodes. This discharge is characterized by a bright, continuous arc of plasma that forms as the air ionizes due to the high voltage. Electric arcs can occur in various situations, and they are commonly seen in applications such as arc welding, electrical equipment failures, and lightning.

In plasma physics, "waves" refer to the oscillations or disturbances that propagate through plasmas, which are ionized gases consisting of charged particles, including ions and electrons. These waves can carry energy and information through the plasma and can arise due to various physical mechanisms. There are several types of waves in plasmas, each characterized by its properties and behavior.

Ortwin Hess is a physicist known for his work in the fields of photonics and nanotechnology. He has made significant contributions to research on meta-materials, light manipulation, and photonic devices. His work often involves exploring the fundamental interactions between light and matter at the nanoscale, aiming to develop new technologies for applications in telecommunications, imaging, and sensing. Hess holds positions in academic and research institutions and has published numerous papers in scientific journals on these topics.

P-groups, or *p-groups*, are a specific type of group in the field of abstract algebra, particularly in the study of group theory. A group \( G \) is classified as a p-group if the order (the number of elements) of the group is a power of a prime number \( p \). Formally, this can be expressed as: \[ |G| = p^n \] for some non-negative integer \( n \).