Waves

Waves

1. The Doppler Effect

   • Sound
     • If a car comes towards you sounding its horn, the frequency (or pitch) sounds higher (it has a shorter wavelength therefore). The frequency drops as the car passes and the pitch sounds much lower (the sound has a longer wavelength now) as the car continues to move away.
   • Light - The Red Shift
     • With light, an object moving away from an observer appears to be more red than it would be if the object were stationary. This is because the ‘shift’ is towards the longer wavelengths and this is reffered to as red shift because red light has the longest wavelength in the visible spectrum.

2. Electromagnetic waves

3. Electromagnetic waves

   • Travel through Vacuums
     • Transfer Energy
       • Reflected
         • Refracted
           • Diffracted
             • Travel at the speed of light

4. Speed = Frequency x Wavelength

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