# Difference between Concave and Convex Mirror

The difference between concave and convex mirrors is crucial to understand. The difference between concave and convex mirrors is also among the most commonly asked questions in physics exams and competitive exams. The differences between concave and convex mirrors are listed below in a tabular form to help students assimilate the concept efficiently.

## Difference between Concave and Convex Mirror

Sl. No. Differentiating Property Concave Mirror Convex Mirror
1 Meaning and Other Names
• Concave means rounded or hollowed like the interior of a circle or sphere
• Also called a converging mirror.
• Convex means rounded or curved like the exterior of a circle or sphere.
• Also called a fish eye or diverging mirror.
2 Mirror Shape
3 Structure
• The mirror coating of the concave mirror is on the outside of the spherical surface.
• In concave mirrors, the centre of curvature and the reflecting surface fall on the same side of the mirror.
• The mirror coating of the convex mirror is on the inside of the spherical surface.
• In convex mirrors, the centre of curvature and the reflecting surface fall on the opposite side of the mirror.
4 Position of the Focus
• Focus lies in front of the mirror, i.e. focal length is negative.
• The focus lies behind the mirror, i.e. focal length is positive.
5 Image Properties
• The image formed by a concave mirror is real, inverted and enlarged (except when the object is between P (Pole) and F (Focus), where the image is virtual, erect and enlarged).
• The image formed by a convex mirror is virtual, erect and diminished.
6 Image Projection
• An image can be projected on a screen as if they are real.
• Images cannot be projected on a screen as they are virtual.
7 Usage
• They are used in reflecting telescopes, shaving mirrors, torchlights, etc., as they give a magnified image of the objects.
• Convex mirrors are used as side view or rearview mirrors in vehicles as they cover a wider area of view.

These were the main differences between convex mirrors and concave mirrors. To know more details about them, visit the articles given below. The articles below will help with more details about the focal length of concave and convex mirrors, their image properties, additional uses and other related details.

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## Frequently Asked Questions โ FAQs

Q1

### What are concave mirrors?

Concave mirrors are rounded or hollowed like the interior of a circle or sphere; they are also called converging mirrors.
Q2

### What are convex mirrors?

Convex mirrors are rounded or curved like the exterior of a circle or sphere; they are called a fish eye or diverging mirror.
Q3

### What is a mirror?

A mirror is a reflective surface that bounces off light, producing either a real image or a virtual image. When an object is placed in front of a mirror, the image of the same object is seen in the mirror.
Q4

### Define the principal axis.

The imaginary line passing through the optical centre and the centre of curvature of any lens or a spherical mirror.
Q5

### Define principal focus.

Principal Focus can also be called Focal Point. Itโs on the axis of a mirror or lens wherein rays of light parallel to the axis converge or appear to converge after reflection or refraction.

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