A sudden, usually temporary increase in number or quantity: The baby boom created a bulge in school enrollment. v. bulged, bulgÂ·ing, bulgÂ·es. v.intr. To swell, protrude, or curve outward: a wall bulging after a flood; muscles bulging under a shirt. v.tr. To cause to bulge. [Middle English, pouch, from Old French bulge, bouge, from Latin bulga, bag, of Celtic origin; see bhelgh-in Indo-European roots.] bulgâ²iÂ·ness n. bulgâ²y adj. Synonyms: bulge, balloon, belly, jut, project, protrude These verbs mean to curve, spread, or extend outward past the normal or usual limit: a wallet bulging with money; a clown's pants that ballooned at the waist; a sail bellying in the wind; a boulder jutting from the hillside; a deck that projected from the house in back; eyes protruding from ...
One of the key components of the optical system of many compound microscopes is a condenser. A condenser is a lens that serves to concentrate light from the illumination source that is in turn focused through the object and magnified by the objective lens. It is a basic component of almost all compound light microscopes manufactured since the 19th Century.
A microscope (from the Ancient Greek: Î¼Î¹ÎºÏÏÏ, mikrÃ³s, small and ÏÎºÎ¿ÏÎµá¿Î½, skopeÃ®n, to look or see) is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy. Microscopic means invisible to the eye unless aided by a microscope. There are many types of microscopes. The most common (and the first to be invented) is the optical microscope, which uses light to image the sample.