time-intervals, thusenabling us to measure the velocity of light over relativelyshort distances. 6. The Rotating Mirror Method of Foucault (and Fizeau). —This method, first proposed by Arago, another Frenchman,was worked out by Foucault and Fizeau, jointly at first, butafterwards independently.… … of tlir method, figure 6. M, is a flat mirror, which can berotated vapidly about an axis in its own plane, perpendicularto the plane of the paper. It receives a beam of light from asource S, and reflects it in a direction depending upon theposition of the mirror at the instant. Once in every…
Light
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