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Prism (optics) A familiar dispersive prism. An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base ...
Dispersive prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow ). Different wavelengths (colors) of light will be deflected by the prism at different angles. [ 1] This is a result of the prism material's index of refraction ...
English language young adult fiction and children's literature in general have historically shown a lack of books with a main character who is a person of color, LGBT, or disabled. [112] In the UK 90% of the best-selling YA titles from 2006 to 2016 featured white, able-bodied, cis-gendered, and heterosexual main characters. [ 113 ]
History of optics. Modern ophthalmic lens making machine. Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term ...
A compact fluorescent lamp seen through an Amici prism. In optics and in wave propagation in general, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency; [ 1] sometimes the term chromatic dispersion is used for specificity to optics in particular. A medium having this common property may be termed a ...
The Black Prism is a fantasy novel by American author Brent Weeks. It is the first book in the five-volume [ 1] Lightbringer Series and follows Gavin Guile, known as the 'Prism' and the most powerful person in the world, [ 2] as he combats an uprising led by a self-proclaimed king. The book is described by the author as "a story of normal ...
Book jackets and autographs are presented online along with descriptions and images of children's books, science fiction art, multimedia, and other materials in the collection. For a listing of Asimov's science fiction books in chronological order within his future history, see the Foundation series list of books.
The Magazine of Fantasy & Science Fiction: 1954 All You Zombies: Robert A. Heinlein: The Magazine of Fantasy and Science Fiction: 1959 Allamagoosa: Eric Frank Russell: Analog Science Fiction: 1955 And I Awoke and Found Me Here on the Cold Hill's Side: James Tiptree Jr. The Magazine of Fantasy & Science Fiction: 1972 Arena (short story) Fredric ...