What is waves and sound it's all types in 2020 class 8.

Today we are going to learn what is waves and it's types of waves so let's start 

       What is a wave simple definition?

                              WAVES

A wave are often described as disturbances that travels through a medium from one place to a different place without transportations of matters.

What is waves and its types?

Types of waves.

1 .)mechinical waves 

2. ) Electromagnetic waves.

So let's study in details.what is waves and it's types.

what is longitudinal waves?

1)Longitudinal waves.

A waves in which the particles of waves move back and forth in the same direction in which wave is moving.

a) waves on springs or sound waves in air are example of longitudinal waves.

what is Transverse waves?

what is Electromagnetic waves?

2) Eletctromagenetic waves.

The waves, which don't require medium for his or her propagation ie,

 which may propagate even through the vacuum are called electromagnetic waves.

Light radio waves , x Ray's etc are the samples of Electromagnetic waves.

 These waves propagate with the speed of sunshine in vacuum.

what is sound waves?

3) sound waves.

sound waves are longitudinal mechanical waves. 

supported their frequency range sound waves are divided into following categories.

what is audible waves?

The sound waves which dwell the frequency range 20 Hz to 20000Hz are called audible waves.

what is Infrasonic waves ?

The sound waves having frequencies but 20Hz are called frequencies but 20Hz are called infrasonic waves.

what is ultrasonic waves ?

ultrasonic waves are used for sending signals, measuring the depth of sea, cleaning machinery parts located in hard to succeed in places , like spiral tubes, etc.

what is Eco ?

Echo The repetition of sound thanks to reflection of sound waves, is named echo.

pitch the feeling of a frequency is usually mentioned because the pitch of sound.

what is sonar?

sonar it's represent sound navigation.and ranging.

it wont to measure the depth of a sea, to locate the enemy submarines and shipwrecks.

sound 

sound is very important. we cannot understand anything only when we are watching.

we need some sound to understand things what is happening and to identify well.

how sound produces.

so we are going to take a look on How sound produces. 

so tell you vibration produces sound.

how sound produces in human body.

when we talking to someone then keep 

your fingers in your neck and touch your voice cord do you feel vibration in it yes you fell vibration in your voice cord and

 It is only a thing that help us to speak and to produces a sound