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Wave Phenomena

Wave Phenomena. Doppler Effect. Doppler Effect. Apparent change in frequency as a result of the source or observer moving The frequency of the source does not change *Frequency is related to - pitch for sound (how high or low it is) - color for light. Doppler Effect.

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Wave Phenomena

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  1. Wave Phenomena Doppler Effect

  2. Doppler Effect • Apparent change in frequency as a result of the source or observer moving • The frequency of the source does not change *Frequency is related to - pitch for sound (how high or low it is) - color for light

  3. Doppler Effect Occurs when the source, observer or both are moving Source and observer move closer together • Source notices higher frequency Source and observer move away from each other • Source notices lower frequency

  4. t= 1 s t= 2 s t= 3 s Experiences higher frequency than source Experiences lower frequency than source

  5. Police Car • Point

  6. Doppler Effect Observer and source move closer together • Wave fronts bunch up • Increased frequency • Sound – higher pitch • Light – color shifts toward blue • Decreased wavelength Observer and source away from each other • Wave fronts spread apart • Decreased frequency • Sound – lower pitch • Light – color shifts toward red (Red Shift) • Increased wavelength

  7. Video 1

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