"Sound Wave" | What is A Sound Wave? | Types Of Sound Wave | And Many Other Questions!!!

Say you are talking to your friend and he also talks to you and you two talk and talk Blah Blah Blah... But how can you tell your friend is talking? Of Course I hear it and say that he is talking. But how do you hear? Of Course by my Ear ("Rhymes" Hear Ear). 

Okay Last Question How does sound from your friend reach to your Ear?

Of Course Sound Wave the heading says that! 

• But what is a sound wave?

Sound Wave is a wave which is produced by vibrations of sound. This Vibrations creates compresions and Decompressions in the medium creating the wave.  

• Medium? What kinds of medium?

Medium here talks about states of matter.

Sound travels in solids, liquids and gases. And sound requires a medium to travel. So, it cannot travel in Vacuum.

It is a Mechanical Wave which requires medium to propagate. Eg. Sound

A Non-Mechanical Wave does not  require a medium to propagate. Eg. Light

• But why sound requires the medium to travel?

For that we need to zoom in to the medium. We know that every matter is made up of Atoms and this Sound pushes these atoms and that atom pushes the next atom then the other and the other and it continues. So the atoms move to make the vibrations and it propagates. Without the matter's atoms the sound cannot propagate.

If we see the heading again there is a Topic:

• Types of Sound waves. So this means there are many kinds of waves?

No No... There are not kinds of wave but the sound waves propagates differently in different medium!

There are 2 ways in which the sound wave can propagate.

1. Transverse Wave : Particles and the wave are perpendicular. The Particles moves UP and DOWN and the Wave goes Forward. 
2. Longitudinal Wave : Particles and the wave are parallel. 

In Liquids and Gases sound travels as Longitudinal Wave. But in solids sound travels both as Longitudinal and Transverse Wave. Because Solids have more atoms or the atoms and too close so, both the waves can travel through solids.

• Now there are parts in the wave which you should know! 

The picture itself shows the parts. But there are 2 more things you should know.

1. Frequency : Number of vibrations ( 1 Crest and Trough) per second is known as Frequency.
2. Time Period : The time taken for a wave to complete one vibration ( 1 Crest and Trough) is known as Time Period. 

1/Frequency = Time Period

• Before we end this Blog there is a last question : In which medium does sound travel faster? 

Solids, this is because solids atoms or molecules are packed together so the pushing occurs easier and faster than other mediums. And sound travels the slowest in Gases.

~Thank You~

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