Definition of concave ond convex
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Answer:
Concave is an adjective that describes a surface that curves inward, or is thinner in the middle than on the edges.
In ordinary usage, concave and convex are
typically used when referring to glass surfaces, like the lenses of optical viewing equipment.
The side mirror of a car has a concave surface.
The inside surface of most eyeglasses is concave.
Binoculars contain concave lenses.
Meanwhile, convex describes a surface that curves outward, or is thicker in the middle than on the edges.
You can easily find examples of these surfaces in everyday life. The outside surface of an eyeglass lens is convex. So is the lens of a camera. Other examples include magnifying glasses and the lenses of telescopes.
The plant responds by sending water into its leaves, which rapidly change shape from convex (bent outwards) to concave (bent inwards).
Concave surfaces curve inward.
Convex surfaces curve outward.
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