The importance and types of optical fibres

Optical fibers

Optical fiber cable

It is very important to know that the cellphones send and receive information using invisible radio waves which is a technology called wireless because it uses no cables while the fiber optics sends information coded in a beam of light down a glass or plastic pipe .

 

The types of the sound waves

 

You should know that there are two types of the sound waves which are the audible sounds and the non - audible sounds .

 

The audible sounds such as the sonic waves , And the non - audible sounds such as the ultrasonic waves and the infrasonic waves .

 

How can the human ear differentiate between the sounds ?

 

The sound waves

It is very important to know that the human ear differentiate between the sounds that reach it through the different factors which are the sound pitch , the sound intensity and the sound quality .

 

The nature and the properties of the sound waves

The sound wave

 

The sound

 

You should know that the sound is an external factor that affects the ear causing the sense of hearing . And it produced due to the vibration of the bodies , and it stops when the vibrating bodies stop their vibration .

 

Mechanical waves and some technological applications of sound mechanical waves

 

Do you know that Mechanical waves  are waves which propagate through a material medium ( solid , liquid , or gas ) at a wave speed which depends on the  properties of that medium ?

 

Examples and some technological applications of electromagnetic waves

 

Light , microwaves , x - rays , TV and radio transmissions are all kinds of electromagnetic waves .

Electromagnetic waves are formed when an electric field couples with a magnetic field . The magnetic and electric fields of an electromagnetic waves are perpendicular to each other and to the direction of the wave .