In this chapter, we treat light beams as rays that propagate along straight lines, except at interfaces between dissimilar materials, where the rays may be bent or refracted. This approach, which had been assumed to be completely accurate before the discovery of the wave nature of light, leads to a great many useful results regarding lens optics and optical instruments.
KeywordsTitanium Quartz Dioxide Magnesium Sulfide
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Suggested Reading Material
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