Make a class set of spectrum tubes by first purchasing some diffraction grating, and then constructing the tools with mailing tubes or shoe boxes. If you aren't up for assembling them, you could purchase prepared spectroscope kits. This resource, regardless of how you obtain the tools, helps you explain the electromagnetic spectrum and how the diffraction grating works to separate light by frequency.  

Concepts

color recognition, colors, electromagnetic spectrum, electromagnetism, diffraction, light

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Additional Tags

electromagnetic spectrum, light, color, diffraction, science

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Pros

• Provides a clear explanation of phenomena

Cons

• None