Chat with or write a letter to Grandma to explain how
Chapter 32, Problem 27TAD(choose chapter or problem)
Chat with or write a letter to Grandma to explain how light is emitted from lamps, flames, and lasers. Tell her why fluorescent dyes and paints are so impressively vivid when illuminated with an ultraviolet lamp. Go on to tell her about the higher efficiencies of CFLs and LEDs.
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