Yard: Measuring, Testing, and Verifying Physics

Purpose

The yard namespace contains practical knowledge about how physics is measured, tested, and verified. From detector design to error analysis, from calibration techniques to the philosophy of experimental confirmation.

Why This Namespace Exists

Theory is meaningless without measurement. This namespace bridges the gap between equations and the physical world by documenting how we actually verify what theory predicts.

Topics

Measurement Techniques

• Interferometry and precision measurement
• Particle detectors: tracking, calorimetry, Cherenkov
• Atomic clocks and timekeeping
• Spectroscopy: absorption, emission, Raman
• Gravitational wave detection: LIGO, Virgo, KAGRA

Error Analysis

• Statistical errors vs systematic errors
• Monte Carlo simulation for error estimation
• Bayesian vs frequentist approaches
• Uncertainty propagation
• The art of knowing when you're done

Calibration and Standards

• SI units and their definitions
• Fundamental constants: how we measure them
• Calibration chains: from primary standards to applications
• Cross-calibration between experiments
• The problem of circularity in measurement

Experimental Philosophy

• What counts as a "definitive" experiment?
• Reproducibility crisis in physics
• The role of null results
• Publication bias and the file drawer problem
• Open data and open source in physics

Tools of the Trade

• Data acquisition systems
• Real-time analysis pipelines
• Signal processing basics (FFT, filtering, correlation)
• Visualization techniques for experimental data
• Machine learning in experimental physics

Note: This namespace is newly created. Contributions welcome.