Image size in a mirror mastering physics

Now let us consider the focal length of a mirror-for example, the concave spherical mirrors in Figure 2. The reflected rays seem to originate from behind the mirror, locating the virtual image. Two sets of rays from common points on an object are reflected by a flat mirror into the eye of an observer. But in front of the mirror, the rays behave exactly as if they had come from behind the mirror, so that is where the image is situated.ДЇigure 1. Obviously, if you walk behind the mirror, you cannot see the image, since the rays do not go there. This is a virtual image, since it cannot be projected-the rays only appear to originate from a common point behind the mirror. (The paths of the reflected rays into the eye are the same as if they had come directly from that point behind the mirror.) Using the law of reflection-the angle of reflection equals the angle of incidence-we can see that the image and object are the same distance from the mirror. If the rays are extrapolated backward, they seem to originate from a common point behind the mirror, locating the image. The rays can diverge slightly, and both still get into the eye. Two rays are shown emerging from the same point, striking the mirror, and being reflected into the observerвЂ™s eye. We will use the law of reflection to understand how mirrors form images, and we will find that mirror images are analogous to those formed by lenses.ДЇigure 1В helps illustrate how a flat mirror forms an image. Security mirrors in shops, on the other hand, form images that are smaller than the object. For example, dental mirrors may produce a magnified image, just as makeup mirrors do. Like lenses, mirrors can form a variety of images. Images in flat mirrors are the same size as the object and are located behind the mirror. We only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. Determine focal length and magnification given radius of curvature, distance of object and image.Explain with ray diagrams the formation of an image using spherical mirrors.Illustrate image formation in a flat mirror.By the end of this section, you will be able to:

Image size in a mirror mastering physics