Here's why:
* Speed of light: Electromagnetic radiation, which includes light, radio waves, X-rays, and many other forms, always travels at the speed of light in a vacuum. This is a fundamental constant of the universe.
* Information carrier: Electromagnetic radiation can be modulated, meaning its properties (like frequency or amplitude) can be changed. These changes can encode information. For example:
* Radio waves: Carry information encoded in their amplitude and frequency, allowing us to listen to music or receive news broadcasts.
* Light waves: Carry information in the form of digital data through fiber optic cables, enabling fast internet connections.
Important Note:
While some other things can travel at or near the speed of light (like neutrinos), they don't have the inherent ability to be easily modulated and carry information in a practical way.
