So just remember, concave has the word cave in it so i always imagine that its kind of caving inwards caving inwards its a little bit of an exaggerated drawing but you get. Curved mirrors concave and convex linkedin slideshare. Lenses lenses are made of transparentmaterials, like glass or plastic. Ray, coming from first mirror turns back with same path after reflecting. Pdf the properties of real and virtual images formed by lenses and mirrors are.
In this trivia questions quiz, you will get to learn some more about the different lenses and mirrors and how they differ from each other. Concave mirrors and convex mirrors image formation, ray diagram. Parallel rays of light passing through a thin convex lens cross at the focal point of the lens. You will recognize the causes of aberrations in lenses and mirrors and how these can be minimized.
Analysis of the geometry in ray diagrams for spherical curved mirrors and thin concave and convex lenses give us a relationship between the position of the object s, the position of the image s, and the focal length f. They determine if images are real or virtual, if they are upright or inverted, the focal length of the. Eight important differences between convex and concave lens are compiled in the article in tabular form. All of them are segments of spheres centered on a horizontal axis.
Types of mirrors figure 1 shows the three types of mirrors we will consider. All images formed from convex mirrors are erect, virtual, and diminished in size. Two concave mirrors are placed on same principal axis. The spherical mirrors are the mirrors with a curved reflecting surface. Ray hits the vertex of mirror 1 and reflects with same angle. Uses of convex lens,concave lens,convex mirrors,concave mirrors. Concave and convex lens uses difference between concave. Concave mirror convex mirror image formation by concave mirror concave mirror ray diagram image formation by convex mirror. Figure 1 shows the three types of mirrors we will consider. This compact and easily stored mirror is convex on one side and concave on the other. Ask your students to explain exactly why objects in mirror are closer than they appear, then, use our mirror to. On the contrary, in a concave mirror, the reflecting surface bulges inwards the main difference between a convex and concave mirror lies in the image formed by the two mirrors, i. Convex lenses are converging lenses, and concave lenses are diverging lenses.
Read pdf chapter test mirrors and lenses key chapter test mirrors and lenses key crossintrasystem adapters for optical systems high level of compatibility comfortable and timesaving handling concave mirrors and convex. Most devices that control light have one or more lenses in them some use only mirrors, which can do most of the same things that lenses can do. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in structure. Uses of the concave mirror and the convex mirror in our daily life. This is a fun and engaging way to practice determining the differences between concave and convex lenses.
Oct 23, 2019 lenses are used in all optical instruments, like microscopes, telescopes, cameras, projectors etc. Concave lenses video geometric optics khan academy. Incident rays at least two are drawn along with their corresponding reflected rays. Each face of the lens is part of a sphere and can be convex, concave, or flat. For plane mirrors, the object distance equals the image distance and all images are erect and virtual. Image formation in a convex lens can be explained with the help of three principal rays shown in the figure. Pdf optical images due to lenses and mirrors researchgate.
Concave and convex mirrors are commmonnly called as spherical mirrors, the spherical mirrors have the radius of curvature twice of the focal length i. A convex lens gives a real, inverted image if the object is outside the focal length of the lens. Each ray intersects at the image location and then diverges to the eye of an observer. Sign convention for spherical mirrors and thin lenses. May 07, 2020 just how much do you know about the different types of lenses and mirrors.
Figure 3 illustrates how images are formed by a plane mirror and curved mirrors. Define the following terms in relation to concave spherical mirror. Spherical mirrors are of two types convex and concave. One mark questions convex mirror for seeing traffic at the. Difference between convex and concave lens with figure.
While clicking on the concave mirror button, a concave mirror, object and its image will be displayed in the window. Curvedspherical mirror a curved mirror is a mirror with a curved reflecting surface. Sep 26, 2015 the concave lens is known as the diverging lens because it diverges the rays after they pass through it, the image formed by the concave lens is a virtual image because it can not be received on a screen. Apr 23, 2020 uses of convex mirrorswe saw that, image formed by convex mirrors isposition of the objectposition of the imagesize of the imagenature of the imageat infinityat the focus f,behind the mirrorhighly diminished,pointsizedvirtual and erectbetween infinityand the pole p ofthe mirrorbetween p and f,behin. Lets explore the ray tracing technique to figure out the properties of images when things are kept in front of a concave or a convex mirror. A mirror is a surface which reflects a clear image. Image formation by convex and concave lens ray diagrams. Optics exam2 and problem solutions physics tutorials. The concave side is frontsurface perfect for a physics unit on light and reflection. The focal length is measured from the center of the lens to the focal point. In a plane mirror the image is the same size as the object and the same way up. Figure 315 defining points for concave and convex mirrors.
A lens is made of transparent material with a refractive index larger than air. Convex lenses are also known as converging lens since the rays converge after falling on the convex lens while the concave lenses are known as diverging lenses as the rays diverge after falling on the concave lens. Students will read a sentence and decide if it is describing a concave or convex lense, then glue the box in the correct column. The detailed explaination about concave and convex mirrors is as follows. Mar 03, 2019 convex and concave lenses are spherical lenses. This is explained with the help of ray diagrams as follows. Curving inward, concave lenses cause light to spread out, resulting in a smaller image for the viewer.
Nov 15, 2017 on the contrary, in a concave mirror, the reflecting surface bulges inwards the main difference between a convex and concave mirror lies in the image formed by the two mirrors, i. Position and nature of the image formed by a concave lens. It will give a virtual upright image if the object is within the focal length. Focal length for concave mirror is taken as position and for convex lens is negative. Dec 08, 2018 the focal length of a convex lens is positive, while that of a concave lens is negative. The terms concave and convex are from the perspective of the object. Difference between concave and convex mirrors is discussed and compared with a plane mirror. Snc 2d light and geometric optics convex mirrors extra practice worksheet a draw a ray diagram for each to locate the image. Difference between convex and concave mirror with comparison. There will be a window having two buttons named concave mirror and convex mirror. One such difference is the structure of convex lens is like, thicker at the centre and thinner at the edges. For converging mirrors and diverging mirrors, the focal length is equal to onehalf the radius.
Generally, a convex lens forms a real image, but it can also create a virtual image when the object is in the middle of the focus and optical centre. There are two types of lenses, and they each change the perspective of how things look. To explore the difference between convex and concave lenses and to determine their focal lengths. Sign convention for spherical mirrors the sign conventions for the given quantities in the mirror equation and magnification equations are as follows. Concave and convex lenses image formation curvature. Concave and convex lenses the type of lenses which converge the light beam coming from the source to one point on the other side to form an image is called as a convex lens, while the concave lens which is thinner at the centre and gets thicker as we move towards the edges is called as concave lens. There are two types of curved mirror convex and concave. Convex lens screen purpose to determine the focal length of a thin lens and to explore the difference between convex and concave lenses and to determine their focal lengths. Each of a lens two faces is part of asphere and can be convex or concave if a lens is thicker at the center than theedges, it is a convex, or converging, lenssince parallel rays will be converged tomeet at the focus.
Light ray rules for convex lens and concave lens are discussed. Shows how to draw the ray diagrams for locating the image produced by a concave lens and a convex mirror. The surface may be either convex bulging outward or concave bulging inward. A ray diagram shows the path of light from an object to mirror to an eye. In this spherical mirrors activity, students answer 14 questions about convex and concave mirrors and the images formed in each. A ray parallel to mirror axis passes through the focal point of a concave mirror or appears to come from the focal point of a convex mirror.
In a plane mirror the image is the same size as the object and the same. Ray diagrams 4 of 4 concave lens and convex mirror youtube. Each mirror has a radius of curvature r which is in. Properties of the formed images by convex lens and concave. Uses of convex lens, concave lens, convex mirrors, concave mirrors lenses and mirrors applications study for exams optics,physics s. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. Curved mirrors are all around us in stores, telescopes and even in rear view mirrors.
Concave mirrors and convex mirrors image formation, ray. The focal length of a convex lens is positive, while that of a concave lens is negative. Analysis of the geometry in ray diagrams for spherical curved mirrors and thin concave and convex lenses give us a relationship between the position. In mirrors, images are formed through reflection but lenses form images through refraction. In this article, we will learn about image formation by concave and convex lenses. Convex and concave lenses jonny nelson introduces an animated explanation of lenses a lens is a shaped piece of transparent glass or plastic that refracts light. We look at the image formation by these spherical lenses using ray diagrams. Weve talked a lot about convex lenses, so i thought i would do a quick video on concave lenses, although there arent as many combinations of what a concave lens can do. Of the two types of lenses convex and concave, the concave lenses are used less frequently. A mirror that bulges outwards is called a convex mirror. Oct 03, 2018 concave and convex mirrors are spherical mirrors. An image which can be formed on the screen is known as real image and the one which cannot be formed on screen is known as a virtual image.
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