The property that is unique to electromagnetic waves is their ability to travel through a vacuum. Unlike mechanical waves (such as sound waves or water waves) which require a medium to propagate, electromagnetic waves can propagate through empty space.
The property that is unique to electromagnetic waves is that they can travel through a vacuum or empty space. Unlike other types of waves, such as sound waves or water waves, electromagnetic waves do not require a medium (such as air or water) to propagate. This means that electromagnetic waves can travel through the vacuum of space, allowing us to receive signals from distant stars and galaxies, and enabling communication via radio waves, television signals, and mobile phone signals.
