The speed of electromagnetic waves in a vacuum, denoted by the symbol "c," is a fundamental constant of nature and is approximately equal to 299,792,458 meters per second (m/s). This value is often rounded to 3.00 × 10^8 m/s for convenience.
The speed of electromagnetic waves in a vacuum is a universal constant and is independent of the wavelength or frequency of the waves. This constant plays a crucial role in many areas of physics and is used in various equations and formulas, such as those related to the propagation of light and the behavior of electromagnetic radiation.