Difference Between Concave and Convex Mirror

The Difference Between Concave and Convex Mirror is an important concept in physics that helps to understand how mirrors reflect light and form images. These mirrors are widely used in many devices and everyday applications. Both concave and convex mirrors are types of spherical mirrors, but their shapes and image formation are different. Because of this, they are used for different purposes. In this article, we will understand the major differences step by step.

Table of Contents

• What is a Concave Mirror?
• What is a Convex Mirror?
• What is Difference Between Concave and Convex Mirror?

What is a Concave Mirror?

A concave mirror is a spherical mirror whose reflecting surface curves inward, similar to the inside of a bowl or spoon. Because of this inward shape, light rays falling on the mirror come together at a point after reflection.

This point is called the focus of the mirror.

Interestingly! Concave mirrors are also called converging mirrors because they bring parallel rays of light together at the focal point.

Now you may ask: what type of images do concave mirrors form?

The fact is, a concave mirror can produce both real and virtual images depending on the position of the object. If the object is placed far from the mirror, the image formed is real and inverted. If the object is placed close to the mirror, the image becomes virtual and upright.

Here are some important characteristics of a concave mirror:

• Reflecting surface curves inward
• Light rays converge at a focal point
• The focus lies in front of the mirror
• Can form real or virtual images
• Image may be magnified or reduced

So, in simple words, a concave mirror is a mirror that focuses light and can produce enlarged images.

Read More: Concave Mirror

What is a Convex Mirror?

A convex mirror is a spherical mirror whose reflecting surface curves outward, like the outer surface of a ball.

Because of this outward shape, the reflected light rays spread outward instead of meeting at a point. That is why convex mirrors are called diverging mirrors.

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And you might wonder: what kind of image does it form?

Convex mirrors always produce images that are:

• Virtual
• Upright
• Smaller than the object

These images appear behind the mirror and cannot be projected on a screen.

Moving ahead, one important feature of convex mirrors is that they provide a wide field of view. This means they allow us to see a larger area.

Here are some key characteristics of convex mirrors:

• Reflecting surface curves outward
• Light rays diverge after reflection
• Focus lies behind the mirror
• Always forms virtual and upright images
• The image is always smaller

So, in simple words, a convex mirror is a mirror that spreads light and shows a wider area.

Read More: Convex Mirror

What is Difference Between Concave and Convex Mirror?

Now that we understand what concave and convex mirrors are, the next step is to see how they are different from each other. Although both are spherical mirrors, their shape, image formation, and uses are not the same.

Here’s a closer look at the difference between concave mirror and convex mirror:

Basis of Comparison	Concave Mirror	Convex Mirror
Shape of Mirror	A concave mirror has a reflecting surface that curves inward like the inside of a bowl.	A convex mirror has a reflecting surface that curves outward like the outside of a ball.
Type of Mirror	A concave mirror is called a converging mirror because it brings parallel light rays together at a point.	A convex mirror is called a diverging mirror because it spreads light rays outward after reflection.
Reflection of Light	In a concave mirror, light rays meet at a point called the focal point.	In a convex mirror, light rays spread apart and appear to come from a point behind the mirror.
Position of Focus	The focus of a concave mirror lies in front of the mirror.	The focus of a convex mirror lies behind the mirror.
Type of Image Formed	A concave mirror can form real or virtual images depending on the position of the object.	A convex mirror always forms virtual images regardless of the object’s position.
Image Orientation	The image formed by a concave mirror may be inverted or upright depending on the object distance.	The image formed by a convex mirror is always upright.
Image Size	A concave mirror can produce magnified, diminished, or the same-sized images.	A convex mirror always produces a smaller (diminished) image.
Field of View	A concave mirror shows a smaller field of view.	A convex mirror provides a wider field of view, allowing a larger area to be seen.
Image Projection	A concave mirror can form real images that can be projected on a screen.	A convex mirror cannot project images on a screen because the images are virtual.
Common Uses	Concave mirrors are used in shaving mirrors, headlights, torches, telescopes, and solar cookers.	Convex mirrors are used in rear-view mirrors, security mirrors, and road safety mirrors.

In this article, we learned the difference between concave and convex mirror in a simple and clear way. Concave mirrors have an inward curved surface and can form both real and virtual images. Convex mirrors have an outward curved surface and always form virtual and smaller images. Both mirrors are very useful and are widely used in everyday life.