Given rays of light incident on spherical mirrors, lets practice drawing the reflected rays. These mirrors are made by putting a thin layer of silver nitrate or. In lateral inversions the image is the same size as. 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. 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. For plane mirrors, the object distance equals the image distance and all images are erect and. A mirror is a reflective surface that does not allow the passage of light and instead bounces it off, thus producing an image. One of the easiest shapes to analyze is the spherical mirror. Draw ray diagrams for concave and convex mirrors, and be able to solve the mirror equation for both kinds. 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. The distance of object from the plane mirror is same as the distance of image from the plabe mirror. Now based on the type of reflecting surface we can. It means if you raise your left hand it would appear in the plane mirror that you have raised your right.
We now define a few important terms used for spherical mirrors. Mirror, mirror on the wall eight lessons on mirrors. Worksheet 3 pages and homework 1 page with answers for mirror diagrams, including the law of reflection angles of incidence and reflection equal, a. For converging mirrors and diverging mirrors, the focal length is equal to onehalf the radius. If you are 3 m in front of the mirror, your reflected image will be located 3 m behind the mirror. When an object is placed in front of a plane mirror the image is. 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. When a ray of light falls on a surface, then it can undergo one of the following three phenomenon reflection, refraction or absorption. A ray that passes through f will be reflected parallel. This is a short tutorial on how to draw ray diagrams for plane mirrors. Explain why the reflection of light off ground glass changes from diffuse to specular if you spill water on it. 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.
The law of reflection and plane mirrors the science classroom. The image and object are equidistant from the mirror. Learning objectives and relevant standards are also included in the pdf version of the complete toolkit. The pdf version of the complete toolkit contains all the resources with full descriptions in a printerfriendly format. For plane mirrors, the reflected image a virtual image and object are along the same line, perpendicular to the reflective surface. 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. A plane mirror always forms a virtual image behind the mirror. Plane mirrors tutorials in introductory physics prentice hall, inc. Mirror equation example problems video khan academy. 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. A light ray strikes one mirror at an angle of 30to the normal and then reflects off the second mirror. All images formed from convex mirrors are erect, virtual, and diminished in size. You will be assessed on topics such as what your bathroom mirror can be classified as and the. When it hits an object, one that is not smooth, the rays will bounce at many different angles.
Plane mirrors science and mathematics education research group supported by ubc teaching and learning enhancement fund 20122014 department of curriculum and pedagogy a place of mind f a c u l t y o f e d u c a t i o n. They construct ray diagrams to determine image distance and image magnification for curved mirrors and identify uses for plane and spherical mirrors. Locating the image o draw the incident light ray 1 from the selected point that is perpendicular to. 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. Reflection and mirrors physics classroom answer key. To practice, please reference the following diagrams.
Read pdf gpb physics note taking guide answers 804. Ray diagrams can be one of the trickiest things to really get in introductory physics. Optics lab simulation open the virtual optical bench simulation to do this lab. Draw ray diagrams for concave and convex mirrors, and be able to solve the mirror equation for both kinds of mirrors. To the eye, the ray seems to come from behind the mirror. The lesson covers plane, convex, and concave spherical mirrors with ray diagrams and characteristics. Plane mirrors flat mirrors with light, if one thinks of light bouncing off an object, it travels in all directions. 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 virtual. When you shine with a flashlight on a mirror, you will see a. Two plane mirrors are connected at their sides so that they form a 45angle between them.
To develop skills in practical aspects of handling apparatus, recording observations and in drawing diagrams, graphs, etc. Understand the differences between concave and convex mirrors. 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. A corresponding presentation is free to use and embedded at physicsuk in section 4 waves.
Chapter 34a reflection and mirrors geometrical a powerpoint presentation by paul e. 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. Use the exact values you record for your data to make later calculations. One of the important characteristic of the image is that it is laterally inverted. To acquire knowledge and understanding of the terms, facts, concepts, definitions, laws, principles and processes of physics. 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. This collection of 48 slides leads students slowly and clearly through all the major ray diagrams for lenses and mirrors in a c. 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.
A upright, magnified and real b upright, the same size and virtual c inverted, demagnified and real d inverted, magnified and virtual. Doing problems involving plane mirrors is actually pretty easy since we only have to remember a few things. Snc 2d light and geometric optics convex mirrors extra practice worksheet a draw a ray diagram for each to locate the image. There are a lot of pieces that have to be done just so and the rules seem arbitrary. The centre of the sphere, of which the mirror is a part, is called the centre of. You only have to look as far as the nearest bathroom to find an example of an image formed by a mirror. Calculate the angle of reflection of the light ray off the second mirror. There are four steps to the construction of a ray diagram. Initially, we have an object in front of a plane mirror.
You must understand the differences between these two kinds of mirrors, be able to draw. Tippens, professor of physics southern polytechnic state university a powerpoint presentation by paul e. The most common mirrors are flat and called plane mirrors. A ray of light from the top of the chess piece reflects from the mirror. When it falls on a normal surface then most of the light gets absorbed. On the diagram, rays lines with arrows are drawn for the incident ray and the reflected ray.
Because none of the rays actually emanate from the image, it is called a virtual image. Plane mirrors answer the following questions based on the diagram of plane mirror. Plane mirrors geometric optics doc physics youtube. Refraction at plane surfaces our mission is to provide a free, worldclass education to. 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. A ray parallel to the principal axis will be reflected through f. You must be able to draw ray diagrams for plane mirrors, and be able to calculate image and object heights, distances, and magnifications.
Calculate image and object heights, distances, and magnifications for plane mirrors. These images are also parity inverted, which means they have a leftright inversion. In this video david solves a few exmaple problems involving concave and convex mirrors using the mirror equation and magnification equation. Gauge your understanding of plane mirrors with this quiz and worksheet. 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. Drawing ray diagrams for plane mirrors mini physics. Plane in this case refers to boring, old fashioned, flat mirrors. 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. Light ray diagrams plane mirrors teaching resources.
Written for the cambridge igcse coordinated sciences and combined sciences courses, but obviously a large content overlap with various gcse courses also. Ray diagrams for concave mirrors two principal rays are sufficient to find image, use third and fourth to check your diagram. Mirror formula derivation objects in the mirror are. Waves basics wave behaviour concave mirrors interesting. 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 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.
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