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Descrição do livro

Measure how metals expand with temperature using light. This 1890s study presents a practical method to determine the coefficient of expansion of metals between the freezing and boiling points of water, expressed in terms of a light wavelength with known refrangibility. It shows how a refractometer can be built and refined to make precise length comparisons at high and low temperatures.


The authors describe developing a robust apparatus, including large brass boxes and a refractometer, to keep the experiment free from air and moisture effects. They recount the progression from initial attempts to a fully tested setup, the challenges of obtaining clear fringe measurements, and the eventual demonstration of the method’s feasibility through careful trials and improvements.



    • Introduction of a new interferential approach to measure metal expansion tied to light wavelength.

    • Detailed account of constructing and refining a vacuum-compatible refractometer and supporting hardware.

    • Practical experience from observing expansion in steel and bronze bars, with long-duration testing.

    • Discussion of experimental challenges and the reliability of the method for precise measurements.


    Ideal for readers interested in the history of precision experiments and the development of interferometric techniques.




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    Encadernação Physical Review, Vol. 4 (Classic Reprint) (English Edition):Kindle
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