What is the speed of light constant?

The speed of light in a vacuum is universally recognized as approximately 3.00 x 10^8 meters per second. This value is fundamental in physics and underpins many principles in both classical and modern science, including Einstein's theory of relativity.

The significance of this constant lies in its role in electromagnetic theory, where it defines the speed at which electromagnetic waves, including light, propagate. It is crucial for various calculations in physics and chemistry, such as those involving energy and wavelength in the context of electromagnetic radiation.

Understanding this constant is essential for students as it helps in comprehending how light interacts with matter and the implications for spectral analysis, quantum mechanics, and numerous applications in technology.