Question

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Answer 1

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Explanation:

The basic difference between concave and convex are as follows:

• Concave describes a shape that curves inwards. The sideview mirror of a car, which curves inwards, is a good example of a concave shape.
• Convex describes a shape that curves outwards. An (American) football, which curves outwards, is a good example of a convex shape.

When to Use Concave

• We most commonly use concave to describe processes linked to lenses, mirrors and reflection. A concave mirror, for example, will make you look taller due to the way light reflects back from it. Concave lenses might be used in things like telescopes, binoculars, cameras and lenses in eyeglasses

When to Use Convex

• As with concave, we mostly use convex to describe processes linked to lenses, mirrors and reflection. A convex mirror will make you look smaller due to the way light reflects back from it. Convex lenses might be used in microscopes, magnifying glasses and eyeglasses.
• Convex is also used as a noun in in mathematics and geometry, i.e. it is a name for a type of shape or outwardly curved line.