What is the speed o...
 
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What is the speed of light in a vacuum?

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(@varsharani)
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The speed of light in a vacuum is approximately 299,792,458 meters per second (about 186,282 miles per second). This value is a fundamental constant in physics and is denoted by the symbol "c."


   
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(@darknet)
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The speed of light in air is very close to its speed in a vacuum, but it's slightly slower due to the presence of air molecules, which can cause scattering and absorption of light.


   
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