THE SPEED OF LIGHT AND METHODS OF ITS MEASUREMENT
Keywords:
Speed of light, light measurement, Fizeau experiment, Foucault method, Michelson, vacuum, optical density, refraction, light scattering, electromagnetic waves, light propagation, physics constants.Abstract
This article explores the speed of light, its fundamental properties, and the various methods developed to measure it accurately. It discusses how the speed of light remains constant in a vacuum but varies in different transparent media due to their optical density. The historical progression of key experiments—from Fizeau’s rotating toothed wheel to Foucault’s rotating mirrors and Michelson’s improvements—is examined to highlight advancements in measurement techniques. The article also emphasizes the significance of precisely determining the speed of light, which has led to the modern definition of the meter and enhanced our understanding of light’s nature and behavior. These insights have been crucial for developments in physics and technology.
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References
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