22.6 Locating Images by Ray Tracing Lenses & Mirrors |
| Instructions: Click on the "Start" button to start the applet. You can change the position (p) of the object by entering a number or by dragging it left or right. The corresponding image position (q) is calculated automatically. Conversely, you can type the image position and get the applet to determine the position of the object. You can also input a magnification and get the applet to provide you with the corresponding p and q for that particular lens. You can change the focal length and the sign of the focal length of the lens by using the provided button and text input box. You can also change the lens into a mirror by using the drop-down menu. The focal length of the lens (or mirror) can be changed by clicking on either end and dragging the mouse until the desired shape is obtained. Clicking with the left mouse button and dragging near the middle of the lens (or mirror) moves the lens to the left or right. Clicking with the right mouse button (Windows) and dragging near the middle of the lens (or mirror) enables you to move the whole optical system: lens, object, and image. Throughout your changes, the applet calculates the new image position and the magnification and draws the corresponding ray diagram. Navigation: You can come back to this window by pressing the "Close" box on the applet window. |
| Explanation: This fascinating applet allows you to complete most one-lens and one-mirror problems discussed in the text. You can use it to help you understand the concepts discussed in sections 22.4-22.7. |
| Source: Fu-Kwun Hwang Go to the web site and link to the Online Library for further information. |