Tuning The Invisible: Measuring The Unseen Frequency
Web link opens in a new tab; file link initiates download.
At SLAC National Accelerator Laboratory, I learned how scientists use radio-frequency resonators and a Vector Network Analyzer (VNA) to characterize resonant cavities used in the search for axions, hypothetical particles that may explain dark matter. I will bring this experience to my chemistry students through a supplementary lesson aligned with HS-PS4-1, connecting the relationship among frequency, wavelength, and electromagnetic waves to authentic scientific research. Students begin by reading an adapted article about axion detection to develop scientific literacy and evidence-based reasoning. They then use a low-power NanoVNA to measure the resonant frequencies of metal cans of different sizes, analyze patterns in their data, and explain how the size of a resonator affects its resonant frequency. The lesson concludes with students communicating their understanding by creating an infographic, podcast, or news article that explains how scientists use resonance to detect particles that cannot be observed directly, strengthening data analysis, scientific communication, and connections between classroom chemistry and modern physics.
