science

• Encompasses a range of frequencies 

• Electromagnetic spectrum

  
  

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  Radio waves

  
  

• Maxwell 1867

• Guglielmo Marconi

• They have the longest wavelengths, from a few meters to kilometers

• 3 kHz to 300 GHz

• Amplitude Modulation (AM) 

  
  

• Guglielmo Marconi 

  
  

• Electromagnetic spectrum

  
  

• Radio waves

• Wireless message

• Radio waves 

  
  

• Frequency Modulation (FM)

  
  

• Guglielmo Marconi 

  
  

• Microwaves

  
  

• Modulate or change the amplitude of radio waves (carried wave) they transmit by feeding audio information called input or modulating signal into them.

• Amplitude Modulation (AM) 

  
  

• Electromagnetic spectrum

  
  

• Microwaves

  
  

• 
  

  Guglielmo Marconi

  
  

• Modulate the frequency of the carrier signal.

• Frequency Modulation (FM)

  
  

• Amplitude Modulation (AM) 

  
  

• Infrared radiation

  
  

• Microwaves

  
  

• Have long wavelengths with frequencies that ranges from 1- 1000 GHz.

• Hertz 1888

• In TV-relay systems, radar devices, and guided missiles.

• • Sir William Hersche; (1738-1822)

• Microwaves

  
  

• Infrared radiation

  
  

• Infrared Radiatiion (IR)

  
  

• The differences in the temperature among the colors of the visible spectrum

• Infrared radiation

  
  

• Radio waves

• Frequency Modulation (FM)

  
  

• Amplitude Modulation (AM) 

  
  

• Region occupies a small portion in the electromagnetic spectrum 

• Microwaves

  
  

• Ultraviolet Radiation (UV)

  
  

• X-rays 

  
  

• Visible light

  
  

• Simple a balanced mixture od all the colors in visible spectrum.

• Visible light

  
  

• White light 

  
  

• nfrared radiation

  
  

• • Sir William Hersche; (1738-1822)

• Produced by special laps and extremely hot bodies.

• The sun emits large amounts of UV radiation, which has harmful effects on human health.

• Curved Mirror 

  
  

• Ultraviolet Radiation (UV)

  
  

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  Gamma Rays

  
  

• Concave Mirror