Using+Light+Activities

 **Chapter 2 "Using Light" Explorations** . **__Activity A__**: The Pinhole Viewer For this activity a pinhole viewer was used to look at a shape back lit by a window or door. (A pinhole viewer was used to look at a black triangle taped to a window.)

**__Classifying__**--- describe the image you see. (use sentences) 1. Is the image upside down or right side up? 2. Does the image look smaller or larger than the actual object? 3. Make a sketch of how the light must be traveling from the viewed object, through the pinhole, and to the wax paper. (Draw the image you saw on the waxpaper.)


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Pinhole_Viewer_Explained

 **__Activity B__**: Refracting Light Through a Prism (Observation I & Observtion II) **Observation I:** Set a triangular prism on end on a white piece of paper. Place it so that a flat surface is facing the sun. Answer the following. 1. What happens to the light once it reaches the prism? Why does the light do this? (pages 57 & 58) 2. "You will notice the transparent prism produce a shadow. How is this possible? **Observation II:** Hold the prism on its side about 1 foot above a piece of paper. Move it around until you find the colors of the visible spectrum?  3. What did you have to do to find ROY G. BIV?  4 . Draw how the light travels for each observation. Prism Explained  **__Activity C__**: Convex vs. Concave Lenses  Read pages 59-60 in the text. Make the following table on your paper.  Fill in your observations of the various characteristics of each type of lens.  Lenses || .........Convex Lens........... || ..........Concave Lens........... || (Notice the thickness  of the lens through  its middle.  See the textbook  pictures for help.) ||  ||  || showing what happens  to light rays traveling  parallel through it.  .  .  . ||  ||  || at an object close up,  draw and describe what you see . .  . ||   ||   || at an object far away, draw and describe what you see . .  . ||   ||   || Analyzing---Answer using sentences. (see pg 64 for help) 1. Which type of lens will help correct nearsightedness? Why? 2. Which type of lens will help correct farsightedness? Why? 3. What do you notice about images when both lenses are used together?
 * Convex vs. Concave
 * Draw the Lens shape
 * Draw the lens again
 * Look through the lens
 * Look through the lens

Help link: Lenses and Parallel Rays

Lab source: Annette Faudel