No. Light is in the EM spectrum, and we can see light from the sun as space is a vacuum it can be concluded that EM waves do not need a medium.
medium is the matter a wave trvels through
Waves do not need a medium all time.it depends like u need no medium when it is electromagnetic wave.
Light is a kind of electromagnetic wave.
mechanical wave
Yes.
No
To create a wave, you will need a medium such as water or air, a source of energy to disturb the medium (like wind or a vibrating object), and space for the wave to propagate.
yes, they can travel.
yes
They need a medium to propagate through.
A medium and a pressure differential
Wave is nothing but a transferring of disturbance. So it needs a medium. But if medium is to be material then the wave is named as mechanical wave. If medium is not to be a material and if free space is enough then the wave is found to be electromagnetic. Sound is a mechanical wave and light is an electromagnetic wave