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Physics
13 March, 04:25
Speed of violet light in vacuum
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Stephen Nichols
13 March, 04:26
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Explanation: Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).
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Copper
13 March, 04:33
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Answer: 300,000,000 metres per second
These waves all travel at the speed of light (300,000,000 metres per second) in a vacuum.
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