Question

What is a medium?

Answer 1

Hint: In order to answer the above question, we will be discussing a medium. Something with the help of which we can transfer information or energy. On the basis of how sound can be heard and more such examples, we will conclude our answer.

Complete step by step solution:
A medium in physics is a material that moves energy or light from one substance to another, or from one location to another, or from one surface to another. In this case, the medium serves as a carrier. Any type of energy, including sound waves, light, and heat, can be transferred through the medium.
But what exactly does the term "medium" imply? The wave is carried by a medium, which is a substance or material. You've already heard of the term "news media." The news media refers to the different organizations (newspaper offices, television stations, radio stations, and so on) that transmit information from one place to another in our society. The media transmits information. The news isn't made by the newspapers, and the news isn't made by the media. The news media is simply the vehicle that transports information from its origins to different destinations.
A wave medium, in a similar way, is the material that transports a wave (or disturbance) from one place to another. The wave medium is not the wave, and it does not create the wave; it simply carries or transports the wave from one place to another. The slinky coils are the medium by which the wave moves in our slinky wave. The ocean water is the medium by which a water wave moves as it occurs in the ocean. When a sound wave travels from the church choir to the pews, the medium by which it travels is the air in the building. And in the case of the stadium wave, the fans in the stadium are the means by which the stadium wave passes.
When it comes to sound speed, the medium that transmits the sound is usually air. Changes in the medium's temperature would be reflected in the sound speed. Similarly, if the medium is water, sound travels at a faster rate. When the medium is solid, sound travels at a much faster rate.

Note:
It is very important to note that whenever we hear something or whenever we use internet, or even when we switch on a light. A set of information or energy is transferred from one place to another and we are able to decode that information and interpret it. Light is the only thing in the whole universe which does not require any medium to travel and hence, it can travel in vacuum.