[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a. light in water b. light in vacuum c. sound in air. d. sound in water

The correct answer is B. Light in vacuum has a speed of 300,000 km/sec.

Explanation:

The speed of light is the speed at which electromagnetic oscillations propagate in a medium. In vacuum, the speed of light is maximal, and since 1983 it has been defined that the speed of light is 299,792,458 meters per second or close to 300,000 km / s.

Since the speed of light is so great compared to the speed of everyday movements - for example, the light moves about a million times as fast as sound propagates in atmospheric air at standard conditions - until the Enlightenment was believed to be infinite.