For the following mirrors and corresponding object positions, construct ray diagrams. In this experiment, you will measure the focal length of a concave mirror, locate images produced by real concave mirrors and compare their position to the position predicted by a ray diagram. Its not the law of reflection, i understand that part, but i dont understand how you figure out what angle to draw, for example, the ray that goes from the top of the. Converging and diverging lenses 6 2275 speedway, mail code c9000 austin, tx 78712 512 4715847 i. Concave mirrors generally produce real and inverted images except when the object is between the pole and the principal focus. The goal of the experiment is to be able to analyze ray diagrams so as to determine fundamental properties of image formation. These practice questions will help you study and can.
Part a which, if any, of these scenarios produce a real image. Curvedspherical mirror a curved mirror is a mirror with a curved reflecting surface. The cartesian sign convention is used here using a ray parallel to the principal axis and one incident upon the center of the mirror, the position of the image can be constructed by backprojecting the rays which reflect from the mirror. If an object is placed inside the focal length of a concave mirror, and enlarged virtual and erect image will be formed behind the mirror. The method for drawing ray diagrams for concave mirror is described below. You can see a listing of all my videos at my websit.
Lens ray diagrams 2 types of lenses just like mirrors convex lens converging thick in middle, thin edge opposite of mirror concave lens diverging thin in middle, thick edge. Chapter 34a reflection and mirrors geometrical a powerpoint presentation by. We will cover i what is a concave mirror ii how to read a concave mirror iii reflection by concave mirror iv image formation by concave mirror v uses of concave mirror concave mirror. Consider the case where the shape of the mirror is such that light rays parallel to the axis of the mirror are all focused to a common spot a distance f in front of the mirror. Visually rich powerpoint full of diagrams and animations colorful, custom animations clearly show students how to use ray diagrams to locate images in concave mirrors if you like this resource, the full optics unit zip file 3 weeks worth of lessons covering properties of light, reflection, refraction, concave and. The method is applied to the task of drawing a ray diagram for an object located beyond the center of curvature c of a concave mirror. This video is highly rated by class 7 students and has been viewed 3046 times. 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. A concave makeup mirror is designed so that a person 25. Ray diagrams concave and convex mirrors light cbse.
The most convenient way to create a ray diagram with spherical mirrors is to draw 3 strategic rays. Through the focal point to the mirror the ray will reflect parallel to the principle axis. Convexconverging f concave diverging drawing ray diagrams for convergingdiverging mirrors 1. In the first section of lesson 4, we learned how light is reflected by convex mirrors in a manner that a virtual image is formed. Check your understanding of concave mirrors with an interactive quiz and printable worksheet.
To show how rays travel in order to form images in a concave mirrors. Jacob physical science the line of sight principle suggests that in order to view an image of an object in a mirror, a person must sight along a line at the image of the object. Parallel to the principal axis to the mirror the ray will reflect through the focal point. We are interested in the image produced and therefore the following properties will be looked at. Reflection by concave mirror page 1 of 4 we cover everything you need to know and understand about reflection by concave mirrors. Choose from 361 different sets of quiz ray diagram flashcards on quizlet. When a ray, parallel to principle axis strikes concave or convex mirrors, the reflected ray passes through the focus on the principle axis. In this lab, you will construct the three ray diagrams for diverging mirrors. Define and illustrate your understanding of real, virtual, erect, inverted, enlarged, and. Notes,whiteboard,whiteboard page,notebook software,notebook, pdf,smart,smart technologies ulc,smart board interactive. Drawing ray diagrams for concave mirrors teaching resources.
The physics classroom combines words, graphics, and animations to explain how to construct ray diagrams for concave mirrors. Virtual images are always erect and cannot be taken on a screen. Microsoft word burning paper with a concave mirror. Lets see the ray diagrams for concave mirror for the different positions of the object. When a ray strikes concave or convex mirrors obliquely at its pole, it is reflected obliquely. Ray diagrams let us move now from plane mirrors to spherical mirrors, which curve like the surface of a sphere.
Explain and discuss with diagrams, reflection, absorption, and refraction refraction of light rays. A plane mirror will always produce a virtual image. The image can be located graphically by adopting the following rules. A ray diagram for concave mirror shows no image is formed. Convex mirrors the main difference between concave and convex mirrors is the most easily seen by considering how they reflect light rays parallel and close to. Drawing ray diagrams plane mirrors, concave mirrors, convex mirrors, converging lenses, diverging lenses converging. To understand the basic principles of ray optics to understand the principles of construction of ray diagrams to explain how the images are formed by the concave mirrors for various positions of objects objectives.
Here we are going to look at how exactly concave and convex mirrors distort the image of an object. The image formed by the different mirrors have different characteristics. Convex mirrors always produce virtual, erect and diminished images. Snc 2d light and geometric optics convex mirrors extra practice worksheet a draw a ray diagram for each to locate the image. Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection. Concave mirrors have the focal point f in front of the mirror, and convex mirrors have the focal point behind the mirror. Spherical mirrors can be convex, such as the mirrors on the passenger side of cars, or concave, such as shaving or makeup mirrors. Grade 8 science ray diagrams for concave mirrors the. As can be seen in this diagram below, the incident rays yellow all begin on the top of the object red arrow and are each scattered from the mirror s front, convex surface. The same object is placed at different distances in front of six different concave spherical mirrors. Terminologies associated with sphericalcurved mirrors. Rules and some examples the images produced by spherical mirrors may be either real or virtual and may be either larger or smaller than the object. Ray diagram construction for concave mirrors presented by obina johnson okeny 2. In this equation, the symbols d o and d i represent the distances from the mirror to the object and to the image.
Apr 17, 2020 ray diagrams concave and convex mirrors light cbse class 7 science class 7 video edurev is made by best teachers of class 7. Where will the image form if the same object is placed 15 cm in front of a convex mirror with a focal length of 18 cm. Yet the same method works for drawing a ray diagram for any object location. Which, if any, of these scenarios produce a virtual image. Drawing ray diagrams plane mirrors, concave mirrors. Shows how to draw the ray diagrams for locating the image produced by a concave lens and a convex mirror. A concave spherical mirror has a lens equation similar to that of a geometrical lens. A concave mirror will only produce a virtual image if the object is located in front of. Description of how to draw ray diagrams for convex mirrors for grade 10 science. Ray diagrams concave mirrors to draw these diagrams, we will have to recall the two rules of reflection for concave mirrors.
The reflection of light by different surfaces have different properties. The reflections when dotted back green lines form a virtual image gray arrow behind the mirror. 1 how to draw a principal ray diagram hint not displayed. Light traveling parallel to the principal axis pa will.
You have learned to use ray diagrams to locate images produced by concave mirrors, and you have seen images produced by concave mirrors. For your convenience, blank diagrams will objects already provided are located on this page in ie use landscape mode with margins. Think of a fun house carnival mirror and how you appear shorter or taller, these are all effects that various types of curved mirrors have. Converging lenses are thicker in the centre, and are thinner near the edges. Curved mirrors, ray diagrams, and simulations background information spherical mirrors may be concave or convex.
The radius of curvature r, which is positive for concave mirrors and negative for convex ones. Then describe the location of the image, orientation upright or inverted of the image, the relative size of the image larger or smaller than object, and the type of image real or virtual. When sighting along such a line, light from the object reflects off the mirror according to the law of reflection and travels to the persons eye. Using ray diagrams to locate images in concave mirrors by.
This interactive animation shows that indeed, a concave mirror does produce an image of an object in front of it. Drawing concave mirror ray diagrams in optics with a virtual image part 2 duration. On a separate sheet of paper, answer the following questions 1. Move the object, the candle, with your mouse to explore how the location and the size of. Geometric optics converging lenses and mirrors physics lab iv objective in this set of lab exercises, the basic properties geometric optics concerning converging lenses and mirrors will be explored. Diverging mirrors, sometimes refered to as shoplifting mirrors, only form reduced, virtual images.
These mirrors are often sections of spheres assumed in this class. Where will an image form if an object is placed 58 cm from the mirror. Guidelines for rays falling on the concave and convex mirrors. To figure out the position and size of an image reflected by a curved mirror, you can draw a scaled diagram of the mirror as follows. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Characteristics of the image formed by a concave mirror. Difference between concave and convex mirrors august 24, 2017 admin share this.
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