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The gender/queer lens, while influenced by the feminist lens, treats gender as more of a spectrum, and also considers human sexuality. [5] David Richter notes in The Critical Tradition: Classic Texts and Contemporary Trends that "XXY syndromes, natural sexual bimorphisms, as well as surgical transsexuals [...] defy attempts at binary classification".
Psychoanalytic theory is the theory of personality organization and the dynamics of personality development relating to the practice of psychoanalysis, a clinical method for treating psychopathology. First laid out by Sigmund Freud in the late 19th century (particularly in his 1899 book The Interpretation of Dreams ), psychoanalytic theory has ...
An example is the initial lens described by Pendry, which uses a slab of material with a negative index of refraction as a flat lens. In theory, a perfect lens would be capable of perfect focus – meaning that it could perfectly reproduce the electromagnetic field of the source plane at the image plane.
For a single lens surrounded by a medium of refractive index n = 1, the locations of the principal points H and H ′ with respect to the respective lens vertices are given by the formulas = ′ = (), where f is the focal length of the lens, d is its thickness, and r 1 and r 2 are the radii of curvature of its surfaces. Positive signs indicate ...
Memorial in Jena, Germany to Ernst Karl Abbe, who approximated the diffraction limit of a microscope as = , where d is the resolvable feature size, λ is the wavelength of light, n is the index of refraction of the medium being imaged in, and θ (depicted as α in the inscription) is the half-angle subtended by the optical objective lens (representing the numerical aperture).
A sociological theory is a supposition that intends to consider, analyze, and/or explain objects of social reality from a sociological perspective, [1]: 14 drawing connections between individual concepts in order to organize and substantiate sociological knowledge.
Nonimaging optics (also called anidolic optics) [1] [2] [3] is a branch of optics that is concerned with the optimal transfer of light radiation between a source and a target. . Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source; instead an optimized optical system for optimal radiative transfer from a source to a target is desi
Magnetic lens. Electron optics is a mathematical framework for the calculation of electron trajectories in the presence of electromagnetic fields.The term optics is used because magnetic and electrostatic lenses act upon a charged particle beam similarly to optical lenses upon a light beam.