Uses of concave and convex mirrors pdf
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The concave mirror is a converging mirror so that it is used for many purposes, It is used as a torch to reflect the light , It is used in the aircraft landing at the airports to guide the aeroplanes, It is used in shaving to get an enlarged and erect image of the face.
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The learning objectives in this section help your students master the following standards:. In addition, the High School Physics Laboratory Manual addresses content in this section in the lab titled: Mirrors and Lenses, as well as the following standards:. The lines must be straight lines for the number to have meaning. In this chapter, we are focused on the first three ideas. Trigonometric functions are ratios of the lengths of two sides of a right triangle. There are six possible ratios; therefore, there are six such functions. There are three ways, as shown in Figure
Last updated at April 23, by Teachoo. Diminished - Hence, the image produced is much smaller than the actual size of the object. This helps in providing a wider field of view. Since these mirrors give wide field of view, a large portion of shop can be seen with the help of a single mirror. We saw that, image formed by concave mirrors is. Now, using these results, we see the uses of Concave Mirrors.
Uses of Convex Mirrors
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.
Convex Mirror, Equations. •The equations for convex mirrors are the same as for concave mirrors. –Need to use sign conventions. •A positive sign is used where.
Light - Reflection and Refraction
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.
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.