Spectra

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.  

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Pros

  • Provides a clear explanation of phenomena
Cons

  • None