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Online Lab Ray Tracing Mirrors Gizmo

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Week 11 Online Lab: Ray Tracing Mirrors Gizmo Explore Learning Gizmo: Ray Tracing (Mirrors) For this assignment, you'll use a Gizmo at the Explore Learning web site. Before you begin:  Be sure you have read the assigned reading for the week.  You may want to print this document so that you can note observations as you work with the gizmo. Later, you can type your answers into the Word document and upload it with this assignment form.  All questions to answer are contained in this document. You don’t need to answer any questions at the Explore Learning site.  This lab has a Prior Knowledge piece, a Warm-Up piece, and Activity A & B with an optional extra credit piece (Activity C). Honors students are expected to complete extra credit pieces.  You must answer in a different colored font (-1 point) FINDING THE GIZMO Follow these steps to find the Gizmo:  Go to the Explore Learning website: http://www.explorelearning.com/.  If you have not yet enrolled in the class -- In the upper right hand corner, click on Enroll in a Class.  The class code you need is 6FZRUV6SEM (note - these are all capital letters).  Click on Continue.  If you have used the Explore Learning site before you should be able to log in using your MNOHS username and password (for example, mnohs10ajones / piano227). If you have never used Explore Learning before, you’ll need to register using your MNOHS username and password with the class code. In other words, the class code is only needed once!  Once inside the Physics course, look for the Gizmo called Ray Tracing (Mirrors) and click on Launch Gizmo. Vocabulary: concave mirror, convex mirror, focal point, magnification, real image, reflect, virtual image Prior Knowledge Questions (Do these BEFORE using the Gizmo.) For these questions, it would be helpful to have a metal spoon on hand. If you don’t have one, try to imagine looking at yourself in a spoon. 1. Look at yourself in the front of the spoon (the side where the food sits). What do you see? My face appears to be upside down. The front of a spoon is an example of a concave mirror. 2. What do you see when you look at yourself in the back of a spoon? My face is right side up. The back of a spoon is an example of a convex mirror. Gizmo Warm-up The Ray Tracing (Mirrors) Gizmo™ shows a side view of a light bulb positioned to the left of a mirror. Light rays passing from the light bulb to the mirror are shown. To begin, select the Concave mirror. Turn on Colorize lines. Under Show lines, turn off the Central line and the Line through focal point so that only the Parallel line is showing. 1. The blue dot in front of the mirror is the focal point of the mirror. Move the light bulb on the left around. What is always true about the ray that is reflected from the parallel ray? The reflected ray goes through the focal point. 2. Turn off the Parallel line and turn on the Line through focal point. Move the light bulb around. What do you notice about the reflected ray in this situation? The reflected ray is always straight

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