Waves which require medium for propagation are

Which of the following statements are correct? (i) Sound is produced by vibrations. (ii) Sound requires a medium for propagation. (iii) Light and sound both require a medium for propagation. (iv) Sound travels slower than light.

Which of the following waves does not require any medium for its propagation

Statement I : Sound wave cannot propagate in vacuum. Statement II : Sound waves are elastic waves and require a medium to propagate.

Assertion : Electromagnetic waves do not require medium for their propagation. Reason : They can't travel in a medium.

Which type of waves do not require a material medium for propagation?

Mechanical waves require ________ medium for their propagation.