Elena FitzPatrick Sifford on casta paintingsīrowse this content A brief history of the cultures of Asia Hinduism, Buddhism, Jainism, and Sikhism, a beginner's guide Browse all content Hinduism and Buddhism, an introduction Hinduism Discovering Sacred Texts: Hinduism Sacred texts in Hinduism Hindu deities Hindu temples Beliefs made visible: Hindu art in South Asia Buddhism Introduction to Buddhism The historical Buddha How to recognize the Buddha The Buddha and Buddhist sacred texts Introduction to the stupa Buddhist monasteries Bodhisattvas, an introduction Buddhist meditation and chant Maitreya Bodhisattva Avalokitesvara: Guanyin Seated Buddha Four Buddhas at the American Museum of Natural History Beliefs made visible: Buddhist art in South Asia Jainism An introduction to the Jain faith Jain cosmology Sikhism Origins and development of Sikh faith: The Gurus Sikh prayer and worship Sikh sacred places Zoroastrianism An introduction to Zoroastrianism Beginner's guide to East Asia Trade in East Asia Cultural diversity in East Asia Innovation in East Asia China Browse this content A beginner's guide Imperial China, an introduction Chinese landscape painting Mountings of Chinese paintings: scrolls, fans, and leafs Chinese calligraphy, an introduction Chinese scholar-painters, an introduction Chinese porcelain: decoration Chinese porcelain: production and export Neolithic Browse this content Neolithic period (c. Reframing Art History, a new kind of textbook.Not your grandfather’s art history: a BIPOC Reader.With 503 contributors from 201 colleges, universities, museums, and researchĬenters, Smarthistory is the most-visited art history resource in the world. We believe that the brilliant histories of art belong to everyone, no matter their background. The magnifying glass was the forerunner of the compound microscope (in which a series of lenses are used to focus, magnify, and refocus an image), one of the basic tools used in medicine.At Smarthistory, the Center for Public Art History, we believe art has the power to transform lives and to build understanding across cultures. When the lens is held at exactly two focal lengths from the paper, all of the light will be concentrated into a tiny point, generating enough heat to start a fire. Many people have used a magnifying glass and sunlight to ignite a piece of paper. The magnified image is called a virtual image while the smaller, inverted image is called the real image. The focal length of any lens is determined by the amount of curve on the lens' face. The distance at which this flip occurs is twice the focal length (the distance from the optical center of a lens to the point where the light rays converge) of the lens. However, if the object is far enoughĪway from the lens, the image will flip, appearing smaller and upside down. When these bent rays reach the eye they make the object appear much larger than it actually is. In this way the light rays are bent toward the center of the lens. This is accomplished by placing the lens close to the object to be viewed. Most magnifying glasses are double-convex lenses and are used to make objects appear larger. The first magnifier constructed for scientific purposes is believed to have been designed by the English philosopher Roger Bacon (circa 1220-1292) sometime during the thirteenth century. 37-68) was known to have peered through gemstones at actors on a distant stage. Thousands of years ago Egyptians used chips of crystal or obsidian (a type of shiny stone) to better view small objects. The magnifying glass is one of the most ancient optical (related to the eye) devices known to science.
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