Physics -Waves

Physics -Waves

1. Longitudinal waves

   • Oscillations are parallel
     • Properties of waves
       • Amplitude
         • Rarefaction
       • Wavelength
       • Frequency - Hz
       • Compression
   • Sound waves

2. Tranverse waves

   • Oscillations are perependicular
   • All electromagnetic waves

3. Wave speed = Frequency x wavelength

4. All waves can be...

   • ABSORBED
   • TRANSMITTED
   • REFLECTED

5. Refraction

   • Waves changing direction

6. Electromagnetic waves

   • 3. Infrared
   • 4. Visible light
   • 2. Microwaves
   • 1. Radio waves
     • Can be produced by oscillations in electrical circuits
   • 5. Ultraviolet
     • Can cause skin to age and skin cancer
   • 6. X-rays
   • 7. Gamma rays
     • X-rays and gamma rays are ionising radiation - can cause mutations of genes and cancer

7. Practical applications of electromagnetic waves

   • Radio waves - TV and radio
   • Microwaves - Satellite communications, cooking
   • Infrared - infrared cameras
   • Ultraviolet - sun tanning
   • X- rays and gamma rays - medical imagining, treatment

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