How to Stop Light in Its Tracks

The video explores the concept of light speed, highlighting its constancy in a vacuum and variations in different mediums. It delves into the groundbreaking ability to slow and even freeze light using electromagnetically induced transparency, a phenomenon first observed in 1991. The process involves using lasers to manipulate energy levels in atoms, creating a 'dark state' where light can pass through a previously opaque medium. This technology has potential applications in quantum computing and cryptography, offering a way to store complex quantum information. Despite challenges, advancements like IBM's chip show promise for future developments.

What is the speed of light in a vacuum, and how does it change when passing through different materials?

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Explain the concept of electromagnetically induced transparency and its significance.

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Describe the conditions necessary for creating a cloud of gas that can induce transparency.

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What happens to electrons in the sodium gas cloud when the probe and coupling beams are shone together?

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How do physicists manage to slow down light to a crawl, and what implications does this have?

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Discuss the potential applications of freezing light in the context of quantum computing.

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What advancements have been made in slowing light using materials closer to room temperature?

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