Spherical Mirror and Its Types

Daily, to get ready, we look into the mirror.

There are different kinds of mirrors around us.

At home, we usually have a regular plane mirror attached with a dressing table.

Our vehicles have rearview mirrors which are one type of spherical mirrors.

Dentists use a mirror to magnify, which is another type of spherical mirror.

The first one is called a plane mirror. And the remaining two are called spherical mirrors.

Now let us see how Spherical Mirrors are made.

We take a spherical surface and polish it. If we polish the outer surface it is a convex mirror, If we polish its inner surface then it is called a concave mirror.

A spherical mirror is simply a piece of a reflective sphere.

Concave mirror

A concave mirror is formed when the inner surface of the spherical surface is polished.

This mirror forms a magnified or diminished image depending on the position of the object. If the object is too close, it is magnified and if it's far then the image is diminished.

The image formed by a concave mirror is real. REAL image means it forms in front of the mirror and it can be captured on a screen

A concave mirror can also form an image behind the mirror. It cannot be captured on a screen. This kind of image is called VIRTUAL IMAGE. We can see them directly with our eyes.

Convex Mirrors

The spherical mirror with the outer surface polished is called a convex mirror.

The image formed by a convex mirror is virtual, erect and diminished.

Revision

A spherical mirror is simply a piece cut out of a reflective sphere

The spherical mirrors are formed by polishing the spherical surface.

If the inner surface is polished it is called concave mirror and if the outer surface is polished then it is called convex mirror.

Real image: An image that forms in front of the mirror and can be captured on a screen.

Virtual image: An image that forms behind the mirror and is physically impossible to reach.

Magnified means the size of the image is larger than the size of the object.

A concave mirror can form magnified and diminished images or Real and virtual images and erect and inverted images depending on the position of the object relative to the mirror.

Diminished image means the size of the image is smaller than the size of the object.

A convex mirror can form only virtual, erect and diminished images.

The End