The proper value of speed of light in air?
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3 ×10 ^8 meter /second is the ans
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The speed of light is 186,000 miles per sec
( 300 million metres per sec)
2nd postulate of relativity .The speed of light in a vaccum is the same for all observers,regardless of their motion relatives to the source.
Implication:The speed of light is a universal constant
Actually,the speed of light is 186,000 milez per sec( 299,72 km per sec) or 670,616,629 mph
Your question's answer will vary since there isn't exact information as temperature,rate of ionization,etc
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