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THE VELOCITY OF LIGHT
REFLECTION AND REFRACTION BY HUYGENS PRIN
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amplitude analyzer angular aperture atom Balmer series band beam of light corresponding crown glass crystal diagram diffraction direction dispersion displacement distance double slit electric electron emergent emitted energy equal ether example eye lens eyepiece face film focal length give rise given glass grating hydrogen incident index of refraction intensity lens of focal lenses linear magnifying power maximum measured medium method microscope mirror motion narrow Nicol prism normal observed obtained optic axis orbit parallel rays particle path difference perpendicular phase difference placed plane polarized plane waves plate polarized light Polaroid position principal plane problem quantum radiation radius of curvature Ramsden eyepiece rectilinear propagation reflected relation represented resolving power resultant amplitude right angles rotation sodium spectral line spectrum spherical student surface telescope thickness thin transmitted tube velocity of light vibration plane wave theory wave-front wavelength wavelets width Zeeman effect