The topic or concept is briefly introduced, and a key word is written on the chalkboard, overhead transparency, or chart paper. o Students are asked to think of other words that come to mind when they read the key word. It is also appropriate for the students to write down a list of these words to be shared with the class. Directions: Answer the questions about reflection and refraction. occurs when light bounces off an object. occurs when light is bent. When light strikes a surface that is rough, the light will . When light strikes a surface that is smooth, the light will bounce off at equal . What type of material is a lens? transparent (38.2) for the concave mirror, as indicated in Section 38-1. Itmay be shown that Equations (38-1) and (38-2) are correct for all positions of the image and object of both concave and convex mirrors, provided that the following. sign conventions. are employed: (a) Light is assumed to come to the mirror from the left. The Question and Answer sections of our study guides are a great resource to ask questions, find answers, and discuss literature. Home Q & A Ask a question and get answers from your fellow students and educators. Using the Concept Builder The Acceleration Concept Builder is shown in the iFrame below. There is a small hot spot in the top-left corner. Clicking/tapping the hot spot opens the Concept Builder in full-screen mode. Use the Escape key on a keyboard (or comparable method) to exit from full-screen mode.