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Lesson Planet
Heat-sensitive liquid crystal sheets are available in a variety of sizes and temperature ranges. Purchase a class set of hand-held sheets and color half of each with a silver permanent marking pen. Learners of light can hold them under a lamp and see that light is converted into thermal energy and that there is no change under the silver half since light is reflected away.
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Pros
- Liquid crystal sheets are fun to play with and thoroughly demonstrate the concept
- In addition to an explanation of what is happening in regard to energy, there is an enriching explanation of how liquid crystals work
Cons
- None