Question

What is meant by non-mechanical waves?

Answer 1

Hint: To answer our question, what is meant by non-mechanical waves. We shall at first tend to perceive a non-mechanical wave then, describe the wave in regard of completely different characteristics like speed, their activity pattern under completely different mediums, etc. We will additionally see how these waves are created or generated.

Complete answer:
The kinds of carrier waves that do not require any material medium in the least for the transference of energy through them are characterised as Non-mechanical waves. Apparently, Electro-magnetic waves are the sole sort of Non-mechanical waves to be found. Non-mechanical waves are generated, once the electrically charged particles are vibrated. This successively produces electric and magnetic fields, hence the name electromagnetic radiation. The speed of a non-mechanical wave is very close to the speed of light. Although, it is slightly less but it is still in comparable range with the speed of light.
When a non-mechanical wave is travelling from one medium to another, its speed is reciprocally proportional to the optical density of the medium, that is, greater the optical density lesser the speed of electromagnetic waves. This principle is employed in refurbishing valuable stones that are created with additional cuts so that the phenomenon of total internal reflection takes place and the stones shine more as light stays inside them relatively for a larger duration of time.

Note:
Light waves or radio waves that we observe entering our Earth from millions and billions of kilometers away are all examples of non-mechanical electromagnetic waves. Were it not for the ability of electromagnetic waves to travel to through vacuum, there would undoubtedly be no life on Earth.