Difference Between Concave and Convex Mirror

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A concave mirror is a lens that promotes the diversion of a straight light beam coming out of a light source. The tendency of reflection is promoted due to curved reflecting surfaces. A convex mirror is a bent mirror that helps to reflect the image that radiates away from the path of the source of light.

Concave mirror and convex mirror differences are so easy to find. Both the mirrors are image-forming systems. You must have encountered these two mirrors in your day to day life.

Let’s get the image of the concave and convex mirror along with their reflection. What do they look like? Both lenses are looking different from each other due to their shape and behaviour with light.  This article will show you the concave and convex mirror difference.

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Distinguish Between the Concave and Convex Mirror

From the diagram, you can easily recognize the image formation difference between a convex mirror and a concave mirror.

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Both of these pictures given above can differentiate between the concave mirror and convex mirror easily.

Benefits of Using Convex Mirrors

  1. Many automobile side mirrors are prepared in the shape of convex mirrors. These mirrors help the rider or driver to get a wider view behind them.

  2. Security devices are using convex mirrors. When one security is appointed to a region, he can view wider portions of the store and monitor the status at once.

  3. Convex mirrors are applicable for roads and driveways. Bikers and drivers can gain safety as the mirrors show them the curves over the road where you can’t notice with your bare eyes. 

  4. Convex mirrors are commonly used among different ATMs. They work as the best and handy security feature.

Benefits of Using Concave Mirrors

  1. Concave mirrors work as the best reflector. These mirrors are used in torchlights, railway engines - motor vehicles, headlights, and so on.

  2. Concave mirrors are also good for focusing. That is why this type of mirror is fitted at the centre of the mirror, which helps to reflect the light rays and make them travel a huge distance.

  3. It helps the light to travel in a straight path with higher intensity.

  4. Scientists use concave mirrors in the lab.

Miscellaneous Apparatus that Uses a Concave Mirror

Concave mirrors help to reflect the light inward to the focal light. Also, concave mirrors have many applications such as:

  • Head mirrors

  • Shaving mirrors

  • Astronomical telescopes

  • Headlights

  • Solar furnaces

  • Ophthalmoscope

Write Two Differences Between Concave and Convex Mirror

Concave Mirror

Convex Mirror

  1. It reflects the incident rays away from the propagated light source. 

  2. The picture size is diminished.

  1. It reflects the incident ray towards the source point in many cases.

  2. The image's nature is virtual and erect.

How Do You Relate Between Concave and Convex?

A table is prepared for you to know better. Using the tabular method, you can learn briefly regarding concave and convex mirrors. They both are useful.

Here is the difference between concave and convex mirror in tabular form:

Sl. No.

Diff Between Convex and Concave

Concave Mirror

Convex Mirror


Different names and their meanings

Rounded or hollowed like the interior is considered as a concave mirror. Some also named it as a converging mirror.

The rounded or curved structure of a mirror is called the convex. 

Many named it a fish-eye or diverging mirror.


Focus Positioning 

In this case, the focal length is positive, and it lies in front of the mirror. 

Here, the focal length is negative, and it lies behind the mirror. 

FAQ (Frequently Asked Questions)

Q1. Mention Some Variety of Images Formed Due to Concave Mirrors.

Ans: Concave mirrors can produce both types of images, such as real and virtual images. In the case of the virtual image, the formed image is upright, and in the case of the real image, it will be inverted. Virtual images are formed behind the mirror, whereas real images are formed in front of the mirror.

Q2. Do You Know the Types of Rules for Concave Mirrors?

Ans: The rays that fall into the surface of concave mirrors travelling parallel with the principal axis will be passed via the focal point. The rays that are passing through the focal point towards the surface of the mirror will be reflected parallel to the principal axis.

Q3. Name the Formula for a Convex Mirror.

Ans: If a body is kept away from the convex mirror of distance u cm and the focal length of the convex mirror is f, then the image will be created at the distance v away from the mirror.

The formula for both the concave and convex mirror, 1/f= 1/u + 1/v

Q4. If the Image of an Object Formed Due to a Concave Mirror has a Height of 7 cm. However, the Actual Height of the Object is 3 cm. Then Find Magnification of the Mirror.

Ans: Magnification, m = Height of image/Height of object = 7 / 3 = 2.33