Answer :
Answer:
electromagnetic waves need a medium to travel through
Mechanical waves can travel through a medium. In fact, mech. waves NEED a medium to travel through.
EM waves can travel through a vacuum. But they can through a medium too, depending on the material of the medium, like air, water, glass etc.
EM waves can travel through a vacuum. But they can through a medium too, depending on the material of the medium, like air, water, glass etc.