Here's why:
* Electromagnetic waves are disturbances in electric and magnetic fields. These fields can exist even in a vacuum, meaning they don't require a medium to propagate.
* Examples of electromagnetic radiation include: light, radio waves, microwaves, X-rays, and gamma rays.
While sound waves and water waves need a medium (like air or water) to travel, electromagnetic waves can travel through the vast emptiness of space, allowing us to receive information from distant stars and galaxies.
