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相关概念视频

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

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In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
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相关实验视频

Updated: Aug 6, 2025

Fabricating Metamaterials Using the Fiber Drawing Method
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Fabricating Metamaterials Using the Fiber Drawing Method

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使用时间变化的元材料的四维光学

Nader Engheta1

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA.

Science (New York, N.Y.)
|March 23, 2023
PubMed
概括

具有时间变化的材料特性的光学平台提供了多样化的应用. 这项研究探讨了它们在先进光学系统和设备中的潜力.

科学领域:

  • 光学和光学
  • 材料科学

背景情况:

  • 动态材料参数对于先进的光学应用至关重要.
  • 时间变化的光学特性使得新功能成为可能.

研究的目的:

  • 探索具有时间变化的材料参数的光学平台的多样化应用.
  • 突出动态光学特性在科学研究中的重要性.

主要方法:

  • 对依赖时间的光学材料的现有文献进行审查.
  • 对动态光学现象的理论模型的分析.
  • 实验实施的案例研究.

主要成果:

  • 在光学切换,可调节过器和动态全息等领域展示了潜力.
  • 确定了具有显著时间变化的光学特性的主要材料类别.
  • 强调控制和利用这些动态效应的挑战和机遇.

结论:

  • 具有时间变化的材料参数的光学平台是一个快速发展的领域.
  • 这些平台对于光子和光学工程的未来创新至关重要.

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