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scientific and technical writers face unique challenges that the everyday writer may not have to worry about. This type of writing often describes concepts that are very complex, difficult to convey in ordinary English, or both.
Even in our day to day lives, we sometimes use words that might seem more at home in scientific literature or esoteric datasheets. For instance, are the lenses in your sunglasses convex or concave? What about zoom lens on your camera? What do these words even mean?
What is the Difference Between Concave and Convex?
In this article, I’ll compare concave vs. convex. I’ll use each in a sentence, and I’ll give you a helpful hint to aid you in choosing concave or convex for your writing.
When to Use Concave
Define concave and define convexWhat does concave mean? 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.
In a paper published Wednesday in the Journal of Optics, Mr. O’Neill lays out a theory that Rembrandt set up flat and concave mirrors to project his subjects — including himself — onto surfaces before painting or etching them. –The New York Times
Concave also has a usage in mathematics, where it refers to the negative of a specific type of function. You should consult a math tutor for a more mathematically precise definition of the function itself. To describe such a function in words, however, you might write a sentence like this:
The line on the graph represents a concave function.