Drawing ray diagrams for plane mirrors mini physics. Plane mirrors geometric optics doc physics youtube. The image and object are equidistant from the mirror. When a ray of light falls on a surface, then it can undergo one of the following three phenomenon reflection, refraction or absorption. The law of reflection and plane mirrors the science classroom. When it falls on a normal surface then most of the light gets absorbed. Calculate the angle of reflection of the light ray off the second mirror. One of the easiest shapes to analyze is the spherical mirror. Plane mirror ray diagrams show how light travels from an object to the mirror to an eye in order for the eye to view the image of the object. Mirrors gpb video georgia teachers and students can stream chemistry. For plane mirrors, the object distance equals the image distance and all images are erect and.
A ray parallel to the principal axis will be reflected through f. Mirror formula derivation objects in the mirror are. To practice, please reference the following diagrams. Waves basics wave behaviour concave mirrors interesting. We now define a few important terms used for spherical mirrors. In physics, researchers often discuss concave and convex mirrors, but nowhere near as much attention is given to the type of mirrors used every day. Phys 4d solution to hw 4 january 28, 2011 problem giancoli 321 i when you look at yourself in a 60cmtall plane mirror, you see the same amount of your body whether you are close to the mirror or far away. Gauge your understanding of plane mirrors with this quiz and worksheet. First edition, 2002 optics 160 we will refer to the method that you devised for locating the piece of paper as the method of parallax. Reflection and refraction of light physics module 6 optics and optical note that the reflecting surface of a convex mirror curves outwards while that of instruments a concave mirror curves inwards. Mirror, mirror on the wall eight lessons on mirrors. Optics lab simulation open the virtual optical bench simulation to do this lab.
On the diagram, rays lines with arrows are drawn for the incident ray and the reflected ray. Two plane mirrors are connected at their sides so that they form a 45angle between them. Now based on the type of reflecting surface we can. Refraction at plane surfaces our mission is to provide a free, worldclass education to. Given rays of light incident on spherical mirrors, lets practice drawing the reflected rays. Worksheet 3 pages and homework 1 page with answers for mirror diagrams, including the law of reflection angles of incidence and reflection equal, a.
When it hits an object, one that is not smooth, the rays will bounce at many different angles. A light ray strikes one mirror at an angle of 30to the normal and then reflects off the second mirror. Understand the differences between concave and convex mirrors. There are a lot of pieces that have to be done just so and the rules seem arbitrary. Calculate image and object heights, distances, and magnifications for plane mirrors. The centre of the sphere, of which the mirror is a part, is called the centre of. A plane mirror always forms a virtual image behind the mirror. A ray of light from the top of the chess piece reflects from the mirror. In lateral inversions the image is the same size as. There are four steps to the construction of a ray diagram. They construct ray diagrams to determine image distance and image magnification for curved mirrors and identify uses for plane and spherical mirrors. Snc 2d light and geometric optics convex mirrors extra practice worksheet a draw a ray diagram for each to locate the image.
Ray diagrams can be one of the trickiest things to really get in introductory physics. The distance of object from the plane mirror is same as the distance of image from the plabe mirror. Ket virtual physics labs worksheet lab 151 plane and spherical mirrors as you work through the steps in the lab procedure, record your experimental values and the results on this worksheet. One of the important characteristic of the image is that it is laterally inverted.
When an object is placed in front of a plane mirror the image is. Written for the cambridge igcse coordinated sciences and combined sciences courses, but obviously a large content overlap with various gcse courses also. Doing problems involving plane mirrors is actually pretty easy since we only have to remember a few things. A corresponding presentation is free to use and embedded at physicsuk in section 4 waves. Initially, we have an object in front of a plane mirror. Learning objectives and relevant standards are also included in the pdf version of the complete toolkit. A mirror is a reflective surface that does not allow the passage of light and instead bounces it off, thus producing an image. The image and object are the same the law of reflection tells us that the angle of incidence is the same as the angle of reflection. Locating the image o draw the incident light ray 1 from the selected point that is perpendicular to. A ray diagram is a diagram that traces the path that light takes in order for a person to view a point on the image of an object. A plane mirror is the technical term for a flat mirror, which produces a virtual image at the same magnification as the object it reflects.
These mirrors are made by putting a thin layer of silver nitrate or. Because none of the rays actually emanate from the image, it is called a virtual image. Tippens, professor of physics southern polytechnic state university a powerpoint presentation by paul e. Draw ray diagrams for concave and convex mirrors, and be able to solve the mirror equation for both kinds of mirrors. Mirror equation example problems video khan academy. Use the exact values you record for your data to make later calculations. You must be able to draw ray diagrams for plane mirrors, and be able to calculate image and object heights, distances, and magnifications. Plane mirrors tutorials in introductory physics prentice hall, inc. The most common mirrors are flat and called plane mirrors. The lesson covers plane, convex, and concave spherical mirrors with ray diagrams and characteristics. You only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. Explain why the reflection of light off ground glass changes from diffuse to specular if you spill water on it.
Typically such a mirror is not a complete sphere, but a spherical cap a piece sliced from a larger imaginary sphere with a single cut. You will be assessed on topics such as what your bathroom mirror can be classified as and the. Ray diagrams for concave mirrors two principal rays are sufficient to find image, use third and fourth to check your diagram. For converging mirrors and diverging mirrors, the focal length is equal to onehalf the radius.
Plane mirror diagrams we can use the law of reflection to draw diagrams to predict the way an observer will see an image in a plane mirror. It means if you raise your left hand it would appear in the plane mirror that you have raised your right. Where to download reflection and mirrors physics classroom answer key reflection and mirrors physics classroom answer key the law of reflection and plane mirrors in this video we will learn the law of reflection and then learn how to draw a ray diagram to describe an image. This collection of 48 slides leads students slowly and clearly through all the major ray diagrams for lenses and mirrors in a c. A ray that passes through f will be reflected parallel. In this video david solves a few exmaple problems involving concave and convex mirrors using the mirror equation and magnification equation. When you shine with a flashlight on a mirror, you will see a. The pdf version of the complete toolkit contains all the resources with full descriptions in a printerfriendly format. When an object is placed between these two mirrors, what is the maximum number of images that could be viewed while looking into the mirrors.
Plane mirrors answer the following questions based on the diagram of plane mirror. A upright, magnified and real b upright, the same size and virtual c inverted, demagnified and real d inverted, magnified and virtual. If you are 3 m in front of the mirror, your reflected image will be located 3 m behind the mirror. Plane mirrors flat mirrors with light, if one thinks of light bouncing off an object, it travels in all directions. Draw ray diagrams for concave and convex mirrors, and be able to solve the mirror equation for both kinds. Images in a plane mirror are the same size as the object, are located behind the mirror, and are oriented in the same direction as the object i. In flat, or plane mirrors, the image is a virtual image, and is the same distance behind the mirror as the object is in front of the mirror. All images formed from convex mirrors are erect, virtual, and diminished in size. You must understand the differences between these two kinds of mirrors, be able to draw.
These images are also parity inverted, which means they have a leftright inversion. To develop skills in practical aspects of handling apparatus, recording observations and in drawing diagrams, graphs, etc. For plane mirrors, the reflected image a virtual image and object are along the same line, perpendicular to the reflective surface. Plane in this case refers to boring, old fashioned, flat mirrors. For plane mirrors, the object distance equals the image distance and all images are erect and virtual. Light ray diagrams plane mirrors teaching resources. Mirror diagrams can be confusing to students, but this foldable and bundled lesson will put all the information in one place and at their fingertips. Take a moment to view the following two demonstrations which show the production of infinite images when two plane mirrors are placed parallel to each other or when three plane mirrors are placed in an equilateral triangle. Chapter 34a reflection and mirrors geometrical a powerpoint presentation by paul e. To acquire knowledge and understanding of the terms, facts, concepts, definitions, laws, principles and processes of physics. Reflection and mirrors physics classroom answer key. Read pdf gpb physics note taking guide answers 804.
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