The rays of light coming from the point reflect according to. In addition to the shape, lenses and mirrors are classi. This type of mirror will produce only smaller and virtual images. A mirror that bulges outwards is called a convex mirror. Locate the image of objects placed before the mirrors and examining the relationships between the object and image locations and the radius of curvature and the focal length. You can skip questions if you would like and come back. You will also verify the mirror and lens equation and the magnification formula by direct measurement of the positions of object and image. Optics exam2 and problem solutions physics tutorials. This simple periscope uses only flat mirrors as compared to the periscopes used on submarines, which are usually a complex optical system using both lenses and mirrors. At the end of the presentation, the ss will be able to correctly differentiate between the three types of mirrors. Understanding how light rays can be manipulated allows us to create better contact lenses, fiber optic cables, and high powered telescopes. Theory analysis of the geometry in ray diagrams for spherical curved mirrors and thin concave.
A upright, magnified and real b upright, the same size and virtual c inverted, demagnified and real d inverted, magnified and virtual. A plane mirror is made of flat glass with one side covered with a metal film that reflects light. Concave converging mirror top and convex diverging mirror bottom. Lenses and how brain adapts to the image reflected or absorbed goals at the end of the presentation the student will be able to correctly differentiate between absorption, reflection and refraction. Lenses lenses are made of transparentmaterials, like glass or plastic. Rays of light parallel to the principal axis after reflection from a concave mirror meet at a point converge. We will measure the focal lengths of lenses using several different methods. Question an object is located on the optical axis and a distance of 8 cm from a thin converging lens having focal length 10 cm. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Chapter 18 mirrors and lenses seneca valley school district. A graph of the inverse of the image distance as a function of the inverse of the object.
Pdf optical images due to lenses and mirrors researchgate. Etkinagentilevan heuvelen process physics 1e ch 22 222 22. The object distance is the distance from the object to the mirror or lens. Chapter 34a reflection and mirrors geometrical a powerpoint presentation by paul e. Ifthe outside, or convex surface, is silvered, we have a convex mirror. The pupil is a little hole which allows light to pass into the eye. A lens is made of transparent material with a refractive index larger than air. It also contains a few examples and practice problems along with the equations needed to solve it.
Mirrors and lenses both have the ability to reflect or refract light. In a plane mirror the image is the same size as the object and the same way up. The lens which disperses the light rays around, that hits the lenses, are called a concave lens. A spherical mirror consists of a small section of the surface of a sphere with one side of the surface covered with a polished reflecting material, usually silver or aluminum. Light waves can be absorbed, reflected, and transmitted by matter. First we need the object and image distances away from the eyeglass lenses. Key ideas are summarized in tables and rules of thumb. Ray hits the vertex of mirror 1 and reflects with same angle. Each face of the lens is part of a sphere and can be convex, concave, or flat. An optical system mirrors or lenses can produce an image of the object by redirecting the light. Draw a light ray diagram for a ray that is reflected by a flat plane mirror drawn below. Ray, coming from first mirror turns back with same path after reflecting from second mirror. If you are watching this video while studying about lenses. Parabolic mirrors and real images opens a modal parabolic mirrors 2 opens a modal convex parabolic mirrors.
Find the distance from the object to the lens, and the distance of the image to the lens, by subtracting out the distance from the lens to the eye. You need only two rays to determine where an image is. A lens which is thinner in the centerthan the edges is. The lens which merges the light rays at a particular point, that travels through it, are a convex lens. To study the relationship between the focal length of thin spherical lenses, the location of an illuminated object, and the location of the image. We will observe the imaging properties of mirrors and lenses at different object distances. Determination of focal length of a converging lens and mirror.
The focal lengths of a biconvex lens and a concave mirror are shown in figures 1 and 2, respectively. V irtual images, located behind the mirror, have negative image distances. Two concave mirrors are placed on same principal axis. Look at the side of the halfscreen that is facing the mirror. We take a brief look at some ways in which mirrors and lenses are utilised in technology. When an object is placed in front of a plane mirror the image is. Mirrors are polished metal that forms images and lenses are transparent glass having curved sides which are used in optical instruments. Concave mirrors and convex mirrors ray diagram equations. Figure 181 the reflected rays that enter the eye appear to origi nate at a point behind the mirror. As of 2010, mirrors and lenses are so prevalent that most people use them every day, regardless of whether or not they consciously perceive the use. As of 2010, mirrors and lenses are so prevalent that most people use them every day, regardless of whether or not they consciously. The paths of light rays incident upon the surface of a mirror may be determined by application of the laws of reflection. Although in this video we are only going to talk about mirrors. A greatly simplified view of the human eye is shown below.
The following points are noteworthy, so far as the difference between convex and concave lens is concerned. University physics 227n232n mirrors and lenses todd satogata. Mirrors and lenses in this experiment you will learn to determine the focal lengths of mirrors and lenses. A lens or mirror that bulges outward from its center is referred to as a convex lens or mirror. It bends light further away in the middle, more like the inside of. Section 1 properties of light main idea a source of light gives off light rays that travel outward in all directions. 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. Here, the newspaper is the object and the focal point is where the image needs to be located. Spherical mirror is a curved mirror which is a part of a hollow sphere. Start studying mirrors and lenses test multiple choice. Mirrors and lenses free download as powerpoint presentation. Spherical mirrors and lenses in this lab we will study the focusing and imaging of spherical mirrors and lenses. This article deals with the uses and applications of. Light and optics truefalse decide whether each of the following statements is true or false.
Name date classnotetaking worksheet continuedsection 3 optical instrumentsa. Learn mirrors and lenses with free interactive flashcards. Introduction to mirrors and lenses when the surface is smooth, such as the surface of glass or a mirror, then it can be easily demonstrated how reflected rays always obey the law of reflection as illustrated below. A lens or mirror that curves inward is a concave lens or mirror. Or should it be a plus sign for mirrors and minus for lenses. Choose your answers to the questions and click next to see the next set of questions. This property has put mirrors and lenses in use for centuries. There are two types of curved mirror convex and concave. One characteristic feature of all thin lenses and concave mirrors is the focal length, f, and is defined as the image distance of an object that is positioned infinitely far way. Mirrors and lenses test multiple choice flashcards quizlet. Chapter 36 lenses a powerpoint presentation by paul e.
Image is located between f and 2f image is located between f and 2f. Science journal describe how you use mirrors and lenses during a typical day. Figure 3 illustrates how images are formed by a plane mirror and curved mirrors. It curves light away from its middle, like the outside portion of a bowl. Should that not be a minus sign on the left hand side. Choose from 500 different sets of mirrors and lenses flashcards on quizlet. Then the same rules are gonna be applied even for lenses as well. Difference between convex and concave lens with figure.
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