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 .

 

Mechanical waves and Electromagnetic waves  cause wave motion .

 

Electromagnetic waves are characterized by :

• They are accompanied with electromagnetic forces . 

   

• Their speed is extremely high ( speed of light is about 300 millions m/s ) .

   

• No medium is required for the Electromagnetic waves to travel through , They can  travel through free space .

   

Examples of electromagnetic waves :

 

•  Gamma rays

• Light waves 

• Wireless waves . ( which are used in communications ) 

• X - rays .

• Ultraviolet and infrared rays ( accompanied by Sun  rays ).

• Radio and television waves .

  

  Ultraviolet rays . x - rays and gamma rays are used in medical purposes .

  
  

  

  The speed of electromagnetic waves are extremely high .

  Technological applications of electromagnetic waves . 

   

  Ultraviolet ( UV ) rays :  They have the property of killing microbes , so they are used to sterilize the sets of surgical operations rooms .

  

  Ultraviolet  rays are rays comes from the Sun .

  X - rays :  They are very important In photographing bones for detecting bone fractures .

   

  Do you know that x - rays are used in examining mineral raws in industry and showing errors , pores and cracks in these minerals ?

  

  X - rays are used in photographing bones for detecting bone fractures .

  Gamma rays : They are used In medical purposes as the treatment and discovering of some swellings ( tumors ) .

  

  Gamma rays kills bacteria in food .

  Visible ( seen ) light : They are used In photographing cameras .

   

   They are very important in  television cameras .

   

   They are used in light shows ( data show ) .

  

  Visible light is used in light shows .

  Infrared ( IR ) rays : They are used in night vision apparatus used by modern military forces .

   

  They are very important in remote sensing instrument to photograph Earth's surface using satellites .

   

  Also they are used in cooking food because these rays have heat effect property and they are used in making remote sets to control and start electric sets ( TV , DVD , air conditioner  .... ) .