The speed of light is 186,000 miles per second in a vacuum.
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The speed of light in a vacuum is 186,282.397 miles per second or 670,616,629.2 miles per hour.
The speed of light in a vacuum is 299 792 458 meters per second or 983,571,056.43045 feet per second or 186,282.397 miles per second or 670,616,629.2 miles per hour.
The speed of light in vacuum is 299,792,458 meters (186,282 miles) per second.
Since a microsecond is a millionth of a second, just divide the distance light travels in one second, by a million.
The speed of light in vacuum is:186,282 miles per second.299,792,458 meters per second.