Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through
fluids, refraction of light).
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It’s Bent II – Procedures
(a lesson plan from UEN)
Question
1. Does the thickness of a liquid affect refraction?
Variable
1. The thickness of the liquid in a cup.
Vocabulary
 Refraction – the bending of light.
Materials
 Four straws
 Four transparent cups
 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.
2. Place a straw in each cup and, on your worksheet, draw what you see.
3. On your worksheet, write your discovery about what each straw looks like in liquids of different
thicknesses.
Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through
fluids, refraction of light).
It’s Bent – Worksheet
(a lesson plan from UEN)
Complete this section before you begin.
Hypothesis (What do you think is going to happen when you put the straw in substance
with different thickness; how will the thickness of the substance affect refraction?)
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Rate the thickness of the liquids (+ - thin; ++ - a little thicker than water; +++ - thick;
++++ - very thick).
Liquid
Rating
Water
Oil
Corn Syrup
Shampoo
Complete this section while doing the experiment.
Draw a picture of what each straw looks like in liquids of different thicknesses.
Water
Oil
Corn Syrup
Shampoo
Objective – Predict and test the behavior of light interacting with various fluids (e.g., light transmission through
fluids, refraction of light).
Complete this section after you have finished your experiment.
1. Describe the results of this lab.
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2. After analyzing your results, was your hypothesis correct or incorrect? Explain why.
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3. Did the thickness of the liquid affect refraction? Explain your answer.
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