Electromagnetic waves are changes in both the electric and magnetic fields of space, which propagate as a wave. These do not need atoms to propagate - on the contrary, the presence of matter tends to interfere with light, etc.
Electromagnetic waves.
Vacuum
electromagnetic waves can travel through vacuum while water waves travel in water.
Electromagnetic waves are waves which can travel through the vacuum of outer space.
Electromagnetic waves.
vacuum
That would be electromagnetic waves.
Mechanical waves travel fastest in mechanically-most-dense media. Electromagnetic waves travel fastest in optically-least-dense media.
Correct, electromagnetic waves can travel through a vacuum. Sunlight is an example of this.
Tranverse waves.
the answer is vacuum.
Vacuum