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Geometrical optics is a branch of optics that uses simplified rules to describe the behavior of light, particularly reflection and refraction. It treats light as rays traveling in straight lines, which is a useful approximation for analyzing optical systems like cameras, microscopes, and telescopes. This model helps explain phenomena such as the formation of shadows and images produced by lenses and mirrors. While it doesn't require a deep understanding of light's wave nature, it accurately predicts how light interacts with surfaces and transparent materials. Key concepts include the law of reflection and Snell's law of refraction, which govern how light changes direction.1234567

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