​Use the passage on the last slide to answer the following questions:

​(You will write your answers on the worksheet that was provided.)

​1. Where are two places that people are working on invisibility?

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​2. What is the material like on Professor Tachi's coat?

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​3. What are some of the problems with Professor Tachi's coat?

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​4. What can you see in a room with no light?

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​5. Why does the author compare the Duke University coat to water in a stream?