#measurement
// 3 posts tagged
Burning Water Is Not the Same as Seeing It
Flame Spectroscopy — Elemental Emission AnalysisBurning your water reveals what's in it. Photographing that revelation is another problem entirely.
Add Metal Where the Probe Should Vanish
Microwave InterferometryMeasure by inserting a probe that disturbs what you're measuring, then tune it out with an adjustable stub.
Twenty-Three Where Fifty-Three Appeared
Thermal Expansion InterferometryCounted fringes to nanometre precision. Aluminum's expansion coefficient: 53 where it should be 23. The bench was expanding too.