Answer:
B
Explanation:
light in vacuum because it's speed is 3×10^8 which is same as the value in question if we convert the km into m.
Answer:
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.
