Question

what is a concave and convex
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Answer 1

Answer:

Concave describes shapes that curve inward, like an hourglass. Convex describes shapes that curve outward, like a football (or a rugby ball).

Explanation:

Answer 2

Answer:

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.

Explanation:

Concave Mirror:

• Made by silvering the outer surface of a part of the hollow glass sphere.

• Converging in nature.

• Image may be real or virtual depending on the position of the object.

• Image may be diminished, same size or magnified.

• The examples of concave mirrors are the mirrors used in automobile head lights, reflecting telescopes, torch lights, etc.

Convex Mirror:

• Made by silvering the inner surface of a part of the hollow glass sphere.
• Diverging in nature.
• Image is diminished.
• The examples of convex mirrors are the mirrors used as rear side mirrors of vehicles, optical instruments, calling bell, etc.
• Image is virtual