It has usually been seen that when lightning strikes, we can see the flashes of light immediately, but its thunder is heard after a while. Observing such a natural phenomenon, probably a thought must have come to your mind that what is actually behind the scene that causes this to happen. You might have also read or heard from somewhere that the speed of sound is slower than the speed of light, but have you ever tried to find out why sound cannot travel faster than light? So let's try to understand this concept today.
Albert Einstein was the first to discover that nothing travels faster than light. The light rays traveling in space at a speed of 300000 km per second do not need any medium to move forward. But this has not usually been the case in sound, as sound needs a medium to travel.
Due to loud music, the wall of the loudspeaker starts vibrating, and due to this vibration, the particles of air in front of the speaker also start vibrating, which produces sound waves that come from the source of the sound. It's just like several balls floating on water, and if a child swims around them, the balls also start moving up and down. And when the child takes himself out, slowly the balls also regain their rest position.
As sound needs a medium to travel, the speed of sound varies from substance to substance, it travels most slowly in gases, faster in liquids, and fastest in solids. In air, it travels at a speed of 343 meters per second. In water it travels at a speed of 1500 m/s, this is because water is denser than air, whereas in concrete it moves at a speed of 3200 to 3700 m/s. The denser and harder the material, the faster the sound waves will pass through it. But there is a complete vacuum in space, there is no air, so there we will not hear the sound of the guitar. But don't forget, sound waves need a medium to travel, that is, sound waves can never move as fast as light.
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