Step-by-step explanation:
Electromagnetic waves are different from sound or water waves in such a way that water and sound waves are called mechanical waves that requires a material medium for their propagation. 
Electromagnetic waves do no require a material medium for propagation. 
- Electromagnetic waves are carried or transported by radiation and this can be passed through vacuums and different other materials. 
 - But mechanical waves such as water and sound waves requires a material medium for their propagation. 
 - They cannot pass through a vacuum.