Answer :
Answer: Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium to travel.
Explanation: 'Electromagnetic' waves do not need any medium to travel whereas 'mechanical waves' need a medium or matter for transmission. Electromagnetic waves are produced by the 'vibrations' of the charged particles. They can even travel in vacuum. Â
On the contrary, mechanical waves are caused by the 'wave amplitude'. Mechanical wave can travel in solid, liquid and gas and are considered to be periodic disturbance.
Answer:
I don't believe it is any of those because sound waves all do that as well as electromagnetic waves
Explanation: