Convex
['kɒnveks] or ['kɑnvɛks]
Definition
(a.) Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave.
(n.) A convex body or surface.
Edited by Astor
Synonyms and Synonymous
a. Gibbous, protuberant, rounding (outwardly).
Edited by Brent
Definition
adj. rising into a round form on the outside the reverse of concave.—n. the vault of heaven &c.—adj. Convexed′ made convex.—adv. Convex′edly.—ns. Convex′ity Con′vexness roundness of form on the outside.—adv. Con′vexly.—adjs. Convex′o-con′cave convex on one side and concave on the other; Convex′o-con′vex convex on both sides.
Edited by Harold
Examples
- The other is a pad made of aluminum which is concave on one side and convex on the other and may be used in a wet pack. Various. The Wonder Book of Knowledge.
- Suppose we place an arrow, _A_, in front of a convex lens (Fig. 73). Bertha M. Clark. General Science.
- Such lenses are called convex or converging lenses. Bertha M. Clark. General Science.
- Convex glasses, by bending the rays and bringing them to a nearer focus, overbalance a short eyeball with its tendency to focus objects behind the retina. Bertha M. Clark. General Science.
- Let a convex lens be placed near a candle (Fig. 75); move a paper screen back and forth behind the lens; for some position of the screen a clear, enlarged image of the candle will be made. Bertha M. Clark. General Science.
- The defect is remedied by convex glasses. Bertha M. Clark. General Science.
- Kepler studied Galileo’s instrument, and then designed one consisting of two convex lenses. Rupert S. Holland. Historic Inventions.
- It cannot depend on one, for that must be either convex, or concave, or plain. Rupert S. Holland. Historic Inventions.
- A camera (Fig. 82) is a light-tight box containing a movable convex lens at one end and a screen at the opposite end. Bertha M. Clark. General Science.
- The distance of the principal focus from the lens is called the focal length of the lens, and from the diagrams we see that the more convex the lens, the shorter the focal length. Bertha M. Clark. General Science.
- The last form neither augments nor diminishes visible objects; the concave diminishes them, the convex increases them, but both show them blurred and indistinct. Rupert S. Holland. Historic Inventions.
- Lenses are very similar to prisms; indeed, two prisms placed as in Figure 69, and rounded off, would make a very good convex lens. Bertha M. Clark. General Science.
- Farsightedness can be remedied by convex glasses, since they bend the light and bring it to a closer focus. Bertha M. Clark. General Science.
- It was developed from the convex lens, which, as we have seen in a previous chapter, had been known for centuries, if not from remote antiquity. Walter Libby. An Introduction to the History of Science.
Edited by Harold