Science. The slowing of a ray of light when it enters or passes through a denser medium; (also) the phase difference between two waves arriving at…
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| 释义 | the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun] > speed of light > slowing (1) retardation1722 Science. The slowing of a ray of light when it enters or passes through a denser medium; (also) the phase difference between two waves arriving at… |
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