The optical properties of a compact disc (CD) under “skimming” light rays have beenanalyzed. We have noticed that a clear green line can be detected when the disc isirradiated with light rays coming from a lamp in such a way that only those skimming theCD, held horizontally, are selected. We provide a physical interpretation of thisphenomenon on the basis of elementary optics concepts. Extension of these concepts todigital versatile discs (DVDs) is given.
American Journal of Physics – American Association of Physics Teachers
Published: Mar 15, 2018
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