True or false mechanical waves need a medium through which to transport energy

Mechanical waves need a medium through which to transport energy is true

True

Explanation:

Mechanical wave cannot travel in the absence of a material medium. The reason why sound can’t be heard in vacuum is because it is a mechanical wave. Seismic wave, which is produced during earthquakes and ocean waves are also mechanical waves.

Mechanical waves are of three types and they are

Electromagnetic waves are known for their propagation without a material medium. X-rays, light waves, infrared waves etc are electromagnetic waves.

Characteristic features of a wave are its frequency, wavelength, speed etc.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.