Electromagnetic Spectrum

Electromagnetic Spectrum

1. Properties

   • All electromagnetic waves are transverse waves that travel with the same speed in vacuum.The speed of light, which is 3.0X10^8 m/s
   • 1.They transfer energy from one place to another. 2.They are transverse waves 3.They can travel through vacuum 4. They travel through vacuum with the speed of light 5.They all show wave properties like reflection and refraction. 6. They obey the wave equation

2. Radio waves

   • • Radio and television communication
       • Radio telescope

3. Microwaves

   • • Satellite communication for satellite television and mobile phone networks
       • Microwave Cooking
         • Radar communication

4. Infra-red rays

   • • Remote control of electrical appliance
       • Intruder alarm
         • Infra-red photography
           • Radiant heater

5. Visible Lights

   • • Optical fibres for medical uses and telecommunications
       • Photosynthesis
         • Lasers for medical, industrial and surveying uses

6. Ultra-violet rays

   • • Sunbeds
       • Sterilisation
         • Forgery detection
           • Fluorescence effect

7. X-rays

   • • Medical/dental inspections
       • Checking welds
         • Airport security
           • Treatment of cancer
             • Analysis of crystal structure

8. Gamma rays

   • • Treatment of cancer
       • Checking welds
         • Sterilising equipment

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