[center][color=#ff0000][/color][i][b]Le lenti sferiche[br][br][br][/b][/i][b][i]Una[/i][/b][u][b][i] lente sferica[/i][/b][/u][color=#ff0000] [/color][b][i][color=#ff0000]è un corpo trasparente delimitato da due superfici sferiche, che produce immagini ingrandite o rimpicciolite degli oggetti[br][br][br][br][/color][color=#0000ff]Le lenti convergenti son più spesse al centro che ai bordi.[br]Fanno convergere in un punto ,detto fuoco, un fascio di raggi paralleli all'asse ottico[br][/color][/i][/b][b][i][color=#0000ff][br][/color][/i][/b][/center][left][color=#0000ff][/color][/left][center][br][br][img]https://i.makeagif.com/media/8-13-2017/4ckYL_.gif[/img][br][br][br][br][br][img]data:image/jpeg;base64,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[/img][br][br][br][br][color=#0000ff][i][b]Le lenti divergenti sono più spesse ai bordi.[br]Fanno convergere un fascio di raggio paralleli all'asse ottico in modo che sembrino uscire da un punto, detto fuoco[br][br][br][/b][/i][/color][br][img]https://lentisottili.weebly.com/uploads/5/4/1/1/54114427/1433600025.png[/img][br][br][color=#0000ff][i][b][br][br][br][/b][/i][/color][/center][i][b][color=#00ff00]1) L'asse ottico è la retta che congiunge i centri delle due superfici sferiche che delimitano la lente;[br][br][br][/color][color=#00ff00]2) Il centro O è il punto dell'asse ottico che divide a metà lo spessore della lente;[br][br][br][/color][color=#00ff00]3) La distanza focale f è la distanza tra il fuoco F e il centro.[br][br][br][br][/color][center][color=#ff0000]La lente di ingrandimento[br][br][br][br][/color][img]https://icon2.cleanpng.com/20180329/frq/kisspng-magnifying-glass-magnification-clip-art-loupe-5abd406740ba24.5713154815223522312651.jpg[/img][br][br][/center][color=#00ffff][center]La lente di ingrandimento e le lenti per gli occhiali da presbite e da ipermetrope[br]sono lenti convergenti. La lente per lo spioncino della porta di casa e quelle degli occhiali[br]da miope sono divergenti[br][br][br][br][img]https://www.gifmania.it/Gif-Animate-Oggetti/Immagini-Animate-Forniture-Per-Ufficio/Gif-Animati-Ufficio-Di-Cancelleria/Lenti-D-39-Ingrandimento/Lenti-D-39-Ingrandimento-55476.gif[/img][br][/center][br][br][br][br][/color][br][br][/b][/i][br][br][center][/center]