This is a fundamental constant in physics and is denoted by the letter c.
Here's why:
* Electromagnetic waves are made of oscillating electric and magnetic fields. These fields propagate through space at the speed of light.
* The speed of light is independent of the speed of the source or the observer. This means that an electromagnetic wave emitted from a stationary source will travel at the same speed as one emitted from a moving source.
Important Note:
While electromagnetic waves travel at the speed of light in a vacuum, their speed can be slightly slower in other mediums, such as air or water.
