Question

what is convex and concave surfaces? Explain the difference between the two.​

Answer 1

$\bold { \red{EXPLANATION \: - }}$

WHAT IS CONCAVE AND CONVEX SURFACE -

• Both the convex and concave mirror is a part of an imaginary sphere.
• The fundamental difference between them is that the reflective surface of a concave mirror is inside the sphere and that of a convex mirror is outside.

DIFFERENTIATION BETWEEN CONCAVE AND CONVEX-

CONCAVE MIRROR -

• Concave mirrors are converging mirrors.
• The parallel incident rays fall on the mirror’s surface and the rays reflect and meet at a certain point known as the focal point.
• Concave mirror’s shape is similar to a spoon.
• When we place this mirror too close to an object, you get a magnified and virtual image.
• However, when there is an increase in the distance between the object and the mirror, the size of the image will reduce thereby creating a real image.
• Thus, the image which forms may be large or small, real or virtual.

CONVEX MIRROR -

• Convex mirrors are diverging mirrors.
• In these, the incident ray which emerges from the same point reflects off and moves in a different direction.
• As a result, the light rays do not intersect on the mirror’s object side and create the virtual image of the real object.
• You can call it a kind of spherical mirror in which the reflective surface curves outwards.
• It will create a virtual image after it reflects from the mirror, the ray of lights will meet at an exact point.
• Moreover, the image which forms is erect, diminished and concerns the object.