Difference Between Concave And Convex Mirrors Pdf

difference between concave and convex mirrors pdf

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The image in a plane mirror has the same size as the object, is upright, and is the same distance behind the mirror as the object is in front of the mirror. A curved mirror, on the other hand, can form images that may be larger or smaller than the object and may form either in front of the mirror or behind it. In general, any curved surface will form an image, although some images make be so distorted as to be unrecognizable think of fun house mirrors. Because curved mirrors can create such a rich variety of images, they are used in many optical devices that find many uses. We will concentrate on spherical mirrors for the most part, because they are easier to manufacture than mirrors such as parabolic mirrors and so are more common.

What is the difference between Concave and Convex mirror?

There are, again, two alternative methods of locating the image formed by a convex mirror. The first is graphical, and the second analytical. According to the graphical method, the image produced by a convex mirror can always be located by drawing a ray diagram according to four simple rules: An incident ray which is parallel to the principal axis is reflected as if it came from the virtual focus of the mirror. An incident ray which is directed towards the virtual focus of the mirror is reflected parallel to the principal axis. An incident ray which is directed towards the centre of curvature of the mirror is reflected back along its own path since it is normally incident on the mirror. An incident ray which strikes the mirror at its vertex is reflected such that its angle of incidence with respect to the principal axis is equal to its angle of reflection.

The properties of spherical mirrors are discussed as we learn such terms as center of curvature, focal point, and principal axis. The properties of images formed by concave and convex mirrors are examined through ray diagrams. Plan and carry out investigations to characterize the properties and behavior of electromagnetic waves. Plan and carry out investigations to describe common features of light in terms of color, polarization, spectral composition, and wave speed in transparent media. Develop models based on experimental evidence that illustrate the phenomena of reflection, refraction, interference, and diffraction. Obtain, evaluate, and communicate information to support the claim that electromagnetic light waves behave differently than mechanical sound waves.

Curved mirror

We only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. Images in flat mirrors are the same size as the object and are located behind the mirror. Like lenses, mirrors can form a variety of images. For example, dental mirrors may produce a magnified image, just as makeup mirrors do. Security mirrors in shops, on the other hand, form images that are smaller than the object.

Predating even crude lenses, mirrors are perhaps the oldest optical element utilized by man to harness the power of light. Prehistoric cave dwellers were no doubt mesmerized by their reflections in undisturbed ponds and other bodies of water, but the earliest man-made mirrors were not discovered until Egyptian pyramidal artifacts dating back to around BC were examined. Mirrors made during the Greco-Roman period and the Middle Ages consisted of highly polished metals, such as bronze, tin, or silver, fashioned into slightly convex disks, which served mankind for over a millennium. It was not until the late Twelfth or early Thirteenth Centuries that the use of glass with a metallic backing was developed to produce looking glasses , but refinement of this technique took an additional several hundred years. By the Sixteenth Century, Venetian craftsmen were fabricating handsome mirrors fashioned from a sheet of flat glass coated with a thin layer of mercury-tin amalgam see Figure 1 for a Gothic version. Over the next few hundred years, German and French specialists developed mirror-making into a fine art, and exquisitely crafted mirrors decorated the halls, dining, living, and bedrooms of the European aristocracy. Finally, in the mids, German organic chemist Justus von Liebig devised a method for depositing metallic silver onto a pre-etched glass surface by chemically reducing an aqueous solution of silver nitrate.

Optical lenses are polished glass or plastic substrates that are shaped with one or more curved surfaces that transmit light. Optical lenses may be used either uncoated or with an antireflective coating depending on their intended application. All optical lenses have a focal length which is the distance from the lens to the focal point along the optical axis of the lens. Three factors determine the focal length of a lens; the radius of curvature of the lens, the refractive index of the substrate from which the lens is made, and the medium in which the lens resides. Lenses that are highly curved and made from material with a high refractive index, and placed in a medium with a large difference in the refractive index will have a shorter focal length and will therefore be more powerful. Convex lenses bulge outward from the center and converge light rays parallel to the optical axis to a focal point beyond the lens.


Difference between concave & convex mirror is given here. Visit now to check the detailed comparison & main differences between concave.


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A concave mirror has the reflecting surface that caves inwards. Concave mirrors converge light to one prime focus point. Therefore, they are also called converging mirrors. They are used to focus light. The image formed by a concave mirror varies in size depending on the position of the object with respect to the mirror.

As the angle of incidence is increased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value? The angle of incidence is the angle between the incident ray and the normal. As this angle approaches 90 degrees, the reflected ray also approaches a 90 degree angle with the normal; thus, the angle between the incident and reflected ray approach degrees. If you stand three feet in front of a plane mirror, how far away would you see yourself in the mirror?

Curved mirror

Segment L: Spherical Mirrors

Mirror refers to any smooth polished or shining surface, that can reflect the light beam and form images. It can be of two types, i. The mirror whose reflecting surface is flat is a plane mirror whereas a mirror with the curved reflecting surface is termed as a spherical mirror. A spherical mirror is of two types, i. A convex mirror has a reflecting surface that bulges outside. The main difference between a convex and concave mirror lies in the image formed by the two mirrors, i. Basis for Comparison Convex Mirror Concave Mirror Meaning Convex mirror implies the mirror whose reflecting surface is away from the center of curvature.

In the first section of Lesson 4 , we learned that light is reflected by convex mirrors in a manner that a virtual image is formed. We also learned that there are two simple rules of reflection for convex mirrors. These rules represent slight revisions of the two rules given for concave mirrors. The revised rules can be stated as follows:. These two rules will be used to construct ray diagrams. A ray diagram is a tool that is used to determine the location, size, orientation, and type of image formed by a mirror. Ray diagrams for concave mirrors were drawn in Lesson 3.

We will examine here the difference between concave and convex mirrors. After that, we will get an idea about the types of mirrors, and different types of images formed by these lenses. First, we will study all the keywords related to the mirrors so that we can learn their meanings. This will help us understand the topic better. The direction of the light gets changed when it falls on an object. The image of an object is formed in the mirror due to the property of reflection of light.


Basically, the reflecting surface of convex mirror bulges outside while concave mirror's bulges inwards. The major difference is the image that forms in these two​.


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A curved mirror is a mirror with a curved reflecting surface.

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