Here's why:

* Electromagnetic radiation: Electromagnetic waves are disturbances in electric and magnetic fields that travel at the speed of light. They don't require a medium to propagate, which means they can travel through the emptiness of space.

* Examples: Examples of electromagnetic radiation include:

* Light (visible light)

* Radio waves

* Microwaves

* Infrared radiation

* Ultraviolet radiation

* X-rays

* Gamma rays

Key point: Sound waves, on the other hand, require a medium (like air, water, or solids) to travel. They cannot propagate through a vacuum.