What this work contributes
Demonstrates repulsive interactions between a gold-coated sphere and silica separated by bromobenzene. Carefully selected material responses can change the sign of a fluctuation-mediated interaction.
Where the evidence stops
This is a three-material fluid experiment, not repulsion from empty space or evidence of reactionless thrust. Optical-property uncertainty and force sensitivity limit quantitative comparison.
Original source
J. N. Munday, Federico Capasso, V. Adrian Parsegian. Measured long-range repulsive Casimir–Lifshitz forces. Nature 457, 170–173 (2009).
DOI: 10.1038/nature07610
How we use it
This record belongs to Casimir forces. Its evidence label describes the cited work, not the maturity of a Metric Flight device. Follow the original methods, corrections and conditions before transferring a result to a different geometry or scale.
Editorial note reviewed 19 October 2026. AI assisted research discovery and synthesis. Citation metadata and claims were checked against primary publication or institutional records; full-text access varies. Read the source for the complete method.