Is there any object which has greater speed than sound?

Answer 1

Sound is actually not an object. It is the ability for vibrations to occur in a medium with a regular fixation of vibrations (Hz). The speed of sound is then again variable, depending on what medium it is travelling through. Like it travels 3 times slower in air at sea level than what it would than sound in 60 degree water because of the water's density levels (compactness of the molecules to transfer the sound easier and quicker). Sound in metal is still faster, it is roughly 16 times faster than sound in air at sea level. So as you can see you have to be specific about the speed of sound and in what medium. Light of course can be comparable to sound because it travels in a similar fashion to what sound does. It has amplitude , Hz, a period and travels in waves (propagated). So the answer to the question is that light is the fastest known thing. We still do not know too much about light, as we know what it is and what it does and we still have no idea what light is.