49. When an electric bulb breaks, there is an explosive sound. That is due to A.The chemical reaction between the gases inside the bulb B.The compressed gases inside rushing out suddenly C.The air outside rushing in to fill the vacuum inside the bulb D.None of these
Option C Solution: The inside of the bulb being a vacuum, the outside air rushes in when the bulb is broken. The vibrations of the rushing air molecules produce the sound.
