Light behaves in ways that have fascinated scientists for centuries. The Feynman Light Index, derived from Richard Feynman's lectures on physics, formalizes the principle that light follows the path requiring the least time. This paper explores the conceptual framework of the Feynman Light Index, relates it to the broader principle of the path of least resistance, and demonstrates how natural systems inherently optimize for efficiency. By examining theoretical models, experimental evidence, and practical applications, this study aims to provide a comprehensive understanding of how light's behavior exemplifies optimization in nature.
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