Source: Geometric Optics Real images are always inverted. Virtual images are always upright. Diverging lens (concave) produce only small virtual images. Light rays bend away from the normal as they gain speed and a longer wavelength by entering a slower (n) medium {frequency remains constant}. The focal length of a converging lens (convex) is shorter with a higher (n) value lens or if blue light replaces red.
Posted on: Mon, 01 Jul 2013 05:38:15 +0000
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