Population inversionIn physics, specifically statistical mechanics, a population inversion occurs while a system (such as a group of atoms or molecules) exists in a state in which more members of the system are in higher, excited states than in lower, unexcited energy states. It is called an "inversion" because in many familiar and commonly encountered physical systems, this is not possible. This concept is of fundamental importance in laser science because the production of a population inversion is a necessary step in the workings of a standard laser.
Applied mathematicsApplied mathematics is the application of mathematical methods by different fields such as physics, engineering, medicine, biology, finance, business, computer science, and industry. Thus, applied mathematics is a combination of mathematical science and specialized knowledge. The term "applied mathematics" also describes the professional specialty in which mathematicians work on practical problems by formulating and studying mathematical models.
Red ScareA Red Scare is a form of right-wing propaganda in which there is a widespread promotion of fear and panic towards the potential rise of communism, anarchism or other leftist ideologies within a society or state. Historically, "red scares" have led to mass political persecution, scapegoating, and the ousting of those in government positions who have had connections with left-wing to far-left ideology. The term is most often used to refer to two periods in the history of the United States which are referred to by this name.
Red foxThe red fox (Vulpes vulpes) is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe and Asia, plus parts of North Africa. It is listed as least concern by the IUCN. Its range has increased alongside human expansion, having been introduced to Australia, where it is considered harmful to native mammals and bird populations.
Far-right politicsFar-right politics, or right-wing extremism, refers to a spectrum of political thought that tends to be radically conservative, ultra-nationalist, and authoritarian, often also including nativist tendencies. The name derives from the left–right political spectrum, with the "far right" considered further from center than the standard political right. Historically, "far-right politics" has been used to describe the experiences of fascism, Nazism, and Falangism.
