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image formation by mirrors

Select the correct answer and click on the “Finish” buttonCheck your score and answers at the end of the quizFollow BYJU’S for all Physics Related Topics and free study materialBy changing the position of the object from the concave mirror, different types of images can be formed. Light converges at a point when it strikes and reflects back from the reflecting surface of the concave mirror. For normal mirrors, the color of an image is essentially the same as that of its object. The three types of images formed by mirrors (cases 1, 2, and 3) are exactly analogous to those formed by lenses, as summarized in the table at the end of Image Formation by Lenses. This is a virtual image, since it cannot be projected—the rays only appear to originate from a common point behind the mirror. Given that the mirror has a radius of curvature of 50.0 cm and produces an image of the coils 3.00 m away from the mirror, where are the coils?We are given that the concave mirror projects a real image of the coils at an image distance Entering known quantities gives a value for [latex]\frac{1}{d_{\text{o}}}\\[/latex]: [latex]\frac{1}{d_{\text{o}}}=\frac{1}{0.250\text{ m}}-\frac{1}{3.00\text{ m}}=\frac{3.667}{\text{m}}\\[/latex].Note that the object (the filament) is farther from the mirror than the mirror’s focal length. The distance of the focal point from the center of the mirror is its focal length f. Since this mirror is converging, it has a positive focal length.Just as for lenses, the shorter the focal length, the more powerful the mirror; thus, [latex]P=\frac{1}{f}\\[/latex] for a mirror, too. A more strongly curved mirror has a shorter focal length and a greater power. 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. [latex]m=\frac{{h}_{\text{i}}}{{h}_{\text{o}}}=-\frac{{d}_{\text{i}}}{{d}_{\text{o}}}=-\frac{-{d}_{\text{o}}}{{d}_{\text{o}}}=\frac{{d}_{\text{o}}}{{d}_{\text{o}}}=1\Rightarrow {h}_{\text{i}}={h}_{\text{o}}\\[/latex] Ray 1 approaches parallel to the axis, ray 2 strikes the center of the mirror, and ray 3 approaches the mirror as if it came from the focal point. Figure 5 shows such a working system in southern California. You might try shining a flashlight on the curved mirror behind the headlight of a car, keeping the headlight switched off, and determine its focal length.Step 1. Note that IR follows the same law of reflection as visible light. \n.

(a) +0.111; (b) −0.334 cm (behind “mirror”); (c) 0.752cm9. (b) Security mirrors are convex, producing a smaller, upright image. We use them because we know the paths of them. If a curved mirror is a part of a sphere then it is known as a spherical mirror. Concave mirrors are also known as a converging mirror since the rays converge after falling on the concave mirror, while the convex mirrors are known as diverging mirrors as the rays diverge after falling on the convex mirror. (a) Parallel rays reflected from a large spherical mirror do not all cross at a common point. Let’s start drawing images of the objects located in different parts of the mirror. For example, dental mirrors may produce a magnified image, just as makeup mirrors do. All three rays cross at the same point after being reflected, locating the inverted real image. If the rays are extrapolated backward, they seem to originate from a common point behind the mirror, locating the image. (credit: kjkolb, Wikimedia Commons)An array of such pipes in the California desert can provide a thermal output of 250 MW on a sunny day, with fluids reaching temperatures as high as 400ºC. This is analogous to a case 2 image for lenses ( Figure 6. Find another flashlight and shine the first flashlight onto the second one, which is turned off. Light from a virtual image only appears to come from the location of the image.Answer is B – Between Focus And Pole Of The Mirror. That is, Figure 4. Obviously, if you walk behind the mirror, you cannot see the image, since the rays do not go there. 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.Figure 1.

It is easiest to concentrate on only three types of images—then remember that concave mirrors act like convex lenses, whereas convex mirrors act like concave lenses. Rays from a common point on the object are traced using the rules in the text. The two mirrors trap most of the bulb’s light and form a directional beam as in a headlight.7. (credit: Laura D’Alessandro, Flickr)A keratometer is a device used to measure the curvature of the cornea, particularly for fitting contact lenses. The front and back of each image is inverted with respect to its object. The reflected rays seem to originate from behind the mirror, locating the virtual image.Now let us consider the focal length of a mirror—for example, the concave spherical mirrors in Figure 2.

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