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Explore the diverse applications of laser technology in this 58-minute Christmas Lecture from The Royal Institution. Discover how pulsed lasers enable scientists to track chemical events occurring in less than a millionth of a millionth of a second, and learn about their selective capabilities in exciting single isotopes within complex mixtures for powerful separation methods. Examine how laser light scattering measures molecular sizes and how intense laser beams remotely detect atmospheric pollutants. Witness demonstrations of holography showcasing the coherence properties of laser light, and observe laser light transmission through exceptionally long optical fibers without intensity loss. Understand how fiber optics enable pressure and temperature sensing, and explore laser gyroscope technology for inertial navigation systems. The lecture also addresses military applications of laser technology, providing a comprehensive overview of how these relatively recent innovations have revolutionized multiple fields including telecommunications, environmental science, medicine, and fundamental scientific research.
