Here's why:
* Radiation doesn't need a medium: Unlike sound waves, which need air or water to travel, radiation can travel through a vacuum. It's a form of energy that travels in the form of electromagnetic waves.
* Electromagnetic spectrum: Radiation encompasses a broad spectrum, including radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays. All of these travel through space.
Examples:
* Sunlight: We receive sunlight from the Sun, which is millions of miles away. This light travels through the vacuum of space.
* Cosmic Microwave Background Radiation: This radiation is a remnant of the Big Bang and fills the entire universe. It travels through the empty space between galaxies and stars.
* Radio waves from space: Radio telescopes detect radio waves from distant galaxies, stars, and other celestial objects, which travel through space to reach Earth.
So, radiation is a powerful force that can travel vast distances through empty space, bringing us light, heat, and information from the universe.
