![]() ![]() In this case, the object is located beyond the center of curvature (which would be two focal lengths from the mirror), and the image is located between the center of curvature and the focal point. The results of this calculation agree with the principles discussed earlier in this lesson. In the case of the image height, a negative value always indicates an inverted image.įrom the calculations in this problem it can be concluded that if a 4.00-cm tall object is placed 45.7 cm from a concave mirror having a focal length of 15.2 cm, then the image will be inverted, 1.99-cm tall and located 22.8 cm from the mirror. As is often the case in physics, a negative or positive sign in front of the numerical value for a physical quantity represents information about direction. The negative values for image height indicate that the image is an inverted image. Since three of the four quantities in the equation (disregarding the M) are known, the fourth quantity can be calculated. To determine the image height, the magnification equation is needed. The final answer is rounded to the third significant digit. The numerical values in the solution above were rounded when written down, yet un-rounded numbers were used in all calculations. The following lines represent the solution to the image distance substitutions and algebraic steps are shown. To determine the image distance, the mirror equation must be used. Next identify the unknown quantities that you wish to solve for. Like all problems in physics, begin by the identification of the known information. Determine the image distance and the image size. These two equations can be combined to yield information about the image distance and image height if the object distance, object height, and focal length are known.Īs a demonstration of the effectiveness of the mirror equation and magnification equation, consider the following example problem and its solution.Įxample Problem #1 A 4.00-cm tall light bulb is placed a distance of 45.7 cm from a concave mirror having a focal length of 15.2 cm. The magnification equation is stated as follows: The magnification equation relates the ratio of the image distance and object distance to the ratio of the image height (h i) and object height (h o). The mirror equation expresses the quantitative relationship between the object distance (d o), the image distance (d i), and the focal length (f). To obtain this type of numerical information, it is necessary to use the Mirror Equation and the Magnification Equation. While a ray diagram may help one determine the approximate location and size of the image, it will not provide numerical information about image distance and object size. Ray diagrams provide useful information about object-image relationships, yet fail to provide the information in a quantitative form. The use of these diagrams was demonstrated earlier in Lesson 3. The new Mirror folder is now synced with the Mirror folder on your storage device.Ray diagrams can be used to determine the image location, size, orientation and type of image formed of objects when placed at a given location in front of a concave mirror. Select a new location for the Mirror folder on your computer.Toolkit opens a file browser window where you can view the files in the folder. On the Mirror screen, click View drive folder.You can view the contents of the Mirror folder on your backup drive: On the Mirror screen, click View computer folder.You can view the contents of the Mirror folder on your computer: On the Main Menu, click on the Play icon on the Mirror activity.Īlternatively, you can click on the Mirror activity to go to the Mirror screen, and then click Resume. ![]() On the Main Menu, click on the Pause icon on the Mirror activity.Īlternatively, you can click on the Mirror activity to go to the Mirror screen, and then click Pause.The Mirror folders must each be named “Mirror” in order to sync. Whenever you add, edit, or delete files in one Mirror folder, Toolkit automatically updates the other Mirror folder with your changes. To add content, drag files to either Mirror folder. The default location is in the Toolkit folder. Adds a folder named "Mirror" to your storage device.Adds a folder named " Mirror" to the selected location on your computer.Select a location on your computer for the mirror folder.On the Main Menu, click on the Mirror activity.The default location is in the Toolkit folder.Ī custom setup lets you choose the location of the mirror folder on your computer. Adds a folder named " Mirror" to your storage device.Adds a folder named " Mirror" in your user folder on the computer.On the Main Menu, click on the Mirror activity.Toolkit can quickly set up a mirror folder in your computer's user folder. Name indicates the name assigned to the external drive. ![]()
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