Which statement is correct about electromagnetic and mechanical waves?

Question

A.
Electromagnetic waves move much slower than mechanical waves.

B.
Electromagnetic waves are transverse, but mechanical waves are longitudinal.

C.
Electromagnetic waves can travel through a vacuum, but mechanical waves need a medium for propagation.

D.
Electromagnetic waves occur when charged particles decelerate, but mechanical waves occur when charged particles accelerate.

Answer 1

C. Electromagnetic waves can travel through a vacuum, but mechanical waves need a medium for propagation.