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Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through fluids, refraction of light). It’s Bent II – Procedures (a lesson plan from UEN) Question Does the thickness of a liquid affect refraction? Variable The thickness of the liquid in a cup. Vocabulary Analyze (Analysis) Data Evidence Observe (Observation) Refraction Variable Materials Four straws Four transparent cups Small amount of water, vegetable oil, corn syrup, and shampoo Procedure 1. Using four transparent cups, place about ½ cup each of water, vegetable oil, corn syrup, and shampoo in a cup. Place a straw in each cup and, on your worksheet, draw what you see. On your worksheet, write your discovery about what each straw looks like in liquids of different thicknesses. ~1~ Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through fluids, refraction of light). Names _______________________________________________________________________ _____________________________________________________________________________ Absent _______________________________________________________________________ It’s Bent II – Worksheet With a transparent object (air, water, clear glass) almost all light passes through. As light passes from one transparent material to another at an angle (from air to water, or air to glass), the light will slow down and appear bent. This is called refraction. A good example of this is placing a pencil in a clear glass of water. The part of the pencil above the water appears to be broken off from the part below the water. Light shining through a glass or Pyrex® baking pan filled with water demonstrates refraction. Note DO NOT use the straws to blow in the liquids. If done, you will not be able to use that liquid to complete the lab activity. Your group will not be able to complete the lab for not following instructions. I. Gather (collect data/evidence) Complete the table & diagram as you do the light activity. Rate the thickness of the liquids (+ - thin; ++ - a little thicker than water; +++ - thick; ++++ - very thick). Liquid Rating Water Oil Corn Syrup Shampoo ~2~ Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through fluids, refraction of light). Draw a picture of your straws in the different thickness each fluid. Water Oil Corn Syrup Shampoo II. Reasoning (Analysis/Analyze/What does the data I gathered mean?) III. Communication (Conclusion/This is what my data means) Come to a conclusion and use your evidence from Part II to support your conclusion. This is your answer to the question – Does the thickness of a liquid affect refraction? ~3~