The reason sound cannot travel as fast as light is due to fundamental differences in the way they propagate through a medium.
Sound is a mechanical wave that requires a medium to travel through, such as air, water, or solids. It propagates by causing particles in the medium to vibrate and transfer energy from one particle to the next. The speed of sound depends on the properties of the medium, such as its density and elasticity. In general, sound travels faster in denser and more elastic materials. For example, sound travels faster in solids than in liquids, and faster in liquids than in gases. In dry air at sea level and room temperature, sound travels at approximately 343 meters per second (or about 1,235 kilometers per hour).
On the other hand, light is an electromagnetic wave and does not require a medium to propagate. It can travel through a vacuum, such as outer space, where there is no air or matter. Light consists of oscillating electric and magnetic fields that interact with charged particles. It moves at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 1 billion kilometers per hour). This speed is commonly denoted as "c" in physics and is considered the maximum speed limit in the universe according to the theory of relativity.
The fundamental difference in the nature of sound and light waves, as well as the requirement of a medium for sound to propagate, are the main reasons why sound cannot travel as fast as light.