On the velocity of light as determined by foucault's revolving mirror

ABSTRACT A FEW years ago Lord Rayleigh raised an interesting question as to the quantity actually determined by our experiments and observations on the velocity of light. There can be no

difficulty as long as the medium transmits different wave-lengths with the same velocity, but whenever the medium possesses the property of dispersion the velocity with which any one crest

of a wave travels (_V_) is different from the velocity with which a group of waves is propagated (_U_); hence the question arises in each particular case, whether it is _V_ or _U_ or

something depending on both quantities that we measure. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS OPTIONS

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institutional subscriptions * Read our FAQs * Contact customer support Authors * ARTHUR SCHUSTER View author publications You can also search for this author inPubMed Google Scholar RIGHTS

AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE SCHUSTER, A. On the Velocity of Light as Determined by Foucault's Revolving Mirror. _Nature_ 33, 439–440

(1886). https://doi.org/10.1038/033439a0 Download citation * Issue Date: 11 March 1886 * DOI: https://doi.org/10.1038/033439a0 SHARE THIS ARTICLE Anyone you share the following link with

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