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from article Deep inelastic collisions

Deep inelastic collision between an electron and a proton, where the nucleon is viewed either (a) as a blob that breaks up or (b) as composed of quarks, one of which is ejected by elastic scattering with the electron.

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from article Optical prism

Optical prism, consisting of a refracting medium bounded by two surfaces. Dispersion of light into its component colors is shown. (After W. J. Smith, Modern Optical Engineering, 3d ed., SPIE Press–McGraw-Hill, 2000)

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from article Optical prism

System of two Porro prisms, used to invert the image in traditional binoculars. (After R. E. Hopkins and R. Hanau, U.S. Military Handbook for Optical Design, republished by Sinclair Optics, 1987)

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from article Optical prism

Pentaprism, used in single lens reflex cameras. (a) Perspective view, showing how the prism deviates light through an angle of 90° without inverting or reverting the image. (b) Ray diagram. (After R. E. Hopkins and R. Hanau, U.S. Military Handbook…

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from article Optical prism

Set of two thin prisms, known as optical wedges, which can be used as an alignment device. (After P. R. Yoder, Jr., Non-image forming optical components, in Geometrical Optics, SPIE Proc., 531:206–220, 1985)

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from article Cardiovascular system

Computerized artwork of the human cardiovascular system, including the heart, lungs, and major arteries and veins. (Credit: Science Photo Library RF/Getty Images)

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from article Cardiovascular system

Diagram of the heart and major vessels of a fetus just before birth. Small arrows within the liver indicate alternative blood routes by way of hepatic sinusoids. (Credit: Based on an original drawing by B. M. Patten; copyright © McGraw-Hill…

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from article Cardiovascular system

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from article Cardiovascular system

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from article Cardiovascular system

Illustration of the human cardiovascular system, which involves pulmonary circulation and systemic circulation. Red vessels transport oxygenated blood; blue vessels transport deoxygenated blood; and purple vessels are involved in gas exchange.…