The speed of light in a vacuum, denoted by the symbol 'c', is considered to be an absolute constant in the theory of relativity. According to our current understanding of physics, the speed of light in a vacuum is approximately 299,792,458 meters per second (or about 186,282 miles per second). It serves as a fundamental limit for the speed at which information, energy, or matter can travel through space.
As for the speed of sound, it depends on the medium through which the sound waves propagate. In general, sound travels slower than light. The speed of sound varies depending on the properties of the medium, such as its density and compressibility. In dry air at sea level and at a temperature of around 20 degrees Celsius (68 degrees Fahrenheit), the speed of sound is approximately 343 meters per second (about 1,125 feet per second).
However, it's important to note that the speed of sound is not an absolute constant and can vary significantly in different materials. For instance, sound travels faster through denser media like water or solids compared to gases. In certain circumstances, such as extreme temperatures or pressures, the speed of sound can be significantly altered.
In summary, the speed of light is an absolute limit in our universe, while the speed of sound is variable depending on the medium through which it propagates.