Sarah Taylor


what is concave mirror

concave mirror characteristics

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concave mirror ray diagram

Concave Mirror Study Guide

Concave mirrors, also known as collection mirrors, have a concave inward reflecting surface (away from the incident light). Curved mirrors reflect light inward toward a single focal point. They are used to focus the light.


dental Source

What is a concave mirror? A concave mirror is a spherical mirror which has a reflecting surface curved inward in the middle.


  • When the light hits the reflective surface of the concave mirror is reflected and returns, and it converges to one point. Therefore, it is also called a collection mirror
  • Bringing the concave mirror very close to the object produces a magnified simulation image. 
  • However, increasing the distance between the object and the mirror will reduce the size of the image and produce the actual image. 
  • Concave mirrors can create small or large images, real or virtual.


  • Concave mirrors are used in telescopes and microscopes.
  • Concave mirrors are used in headlights and torches because the bulb of the headlamp or torch is placed at the focal point (after reflection in the mirror, a parallel beam of light is "focused" at the focal point ‘F’ of a concave mirror) of a concave mirror. Light rays appear as parallel light beams in the headlights and torches after being reflected by a concave mirror. These reflected beams have great intensity and can travel vast distances.
  • Dentists used concave mirrors to get a better vision inside the mouth.
  • Concave mirrors are used in solar furnaces to focus sunlight at a certain place. The huge amount of light collected by the concave mirror is focused on the focal point. Concentrated energy is used in heating, cooking, generating electricity, and melting metals.
  • Shaving mirrors are made of concave mirrors.
  • Searchlights, and flashlights also use concave mirrors.


Object's Position Image Positioning Image Size The Image's Nature
At the limit of infinity At The Focus F Significantly Reduced Inverted and Real
Beyond the curvature's center C Between Focus and C Reduced Inverted and Real
At C At C No change in image(same size) Inverted and Real
Between Focus and C Beyond The curvature's center C Larger than the image Inverted and Real
At Focus At the limit of infinity Exceptionally Larger than image Inverted and Real
Between Focus and Principle Axis Behind the MIrror Larger than image Virtual and erect


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  • A spherical mirror's pole is the center of the reflecting surface.
  • The center of the sphere generated by the reflecting component of a spherical mirror is referred to as the center of curvature. C is the most common abbreviation for it.
  • The principal axis is a linear line that passes through the pole and the spherical mirror's center of curvature.
  • After reflection, incident rays that are parallel to the principal axis appear to converge on a common point on the primary axis, which is known as the principal focus of a concave mirror. It's commonly symbolized with the letter F.
  • The focal length of a concave mirror is the distance between the pole and the major focus. It is represented by the letter f.


• The reflective surface of a concave mirror, also known as a convergent mirror, is recessed inward (away from the incident light). Light is reflected inward toward a single focal point by a curved mirror. They are used to focus the light. 

• Curved mirrors are used in searchlights, flashlights, and flashlights. Concave mirrors include torch lights and automotive headlights.


Q. What are concave mirrors?

When a hollow spherical is divided into parts, and the exterior surface of each cut portion is painted, it forms a mirror, with the inner surface reflecting the light. A concave mirror is a name for this sort of mirror.

Q. What type of image is formed by a concave mirror?

Concave mirrors formed both types of images, real and virtual.

Q. How are concave mirrors used in everyday life?

Shaving mirrors, torchlight, and flashlight are some daily life usage of Concave mirrors.

Q. Write about the image formation by a concave Mirror.

When the concave mirror is put very close to the item, it produces a virtual and enlarged picture; however, as the distance between the object and the mirror increases, the size of the image decreases, and genuine images are produced.

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  1. Concave and Convex Mirror: Accessed 13th April 2022.
  2. Uses of Concave Mirror: Accessed 13th April 2022.