Unverified50% confidenceFactExact time
The speed of light in water is only about 75% of the speed of light in a vacuum.
1
Sources
50%
Confidence
Long-term
Relevance
9/11/2026
First Seen
Sources
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Related Claims
Unverified光从空气进入水中时折射率从1.0变为1.33，水下视场角约为空气中的75%65% similarUnverifiedCherenkov radiation occurs when a charged particle moves through a medium at a speed exceeding the speed of light in that medium (while still remaining below the speed of light in a vacuum).62% similarUnverifiedRed light loses more than 90% of its energy at approximately 3 meters depth in water, while blue-green light has stronger penetration, causing underwater images to exhibit a blue-green color shift.57% similar
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