Waves and the Doppler Effect Parts of a Wave Wave Properties Wavelength Wavelength,, is the distance...

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Transcript of Waves and the Doppler Effect Parts of a Wave Wave Properties Wavelength Wavelength,, is the distance...

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Slide 2 Waves and the Doppler Effect Slide 3 Slide 4 Parts of a Wave Slide 5 Wave Properties Wavelength Wavelength,, is the distance between two consecutive peaks. Slide 6 Wave Properties Amplitude Amplitude is the height of the wave above or below the equilibrium point. Slide 7 Wave Properties Frequency n Frequency, f, is the number of waves passing a particular point in one second. u Also known as pitch. Slide 8 Examples of Frequency n What is the frequency of the second hand of a clock? Frequency = 1cycle/60 sec n What is the frequency of US Presidential elections? Frequency = 1 election/4 yrs Slide 9 8.DOPPLER EFFECT n n Refers to the change in frequency when there is relative motion between an observer of waves and the source of the waves n Doppler with Sound n n Doppler with Water Doppler with Water Slide 10 The Doppler effect- Change in frequency due to the source or receiver greater the speed the source, greater the Doppler effect Stationary bug Bug swimming Bug swimming Blue Shift-increase in frequency Red Shift- Decrease in frequency Slide 11 Supersonic Slide 12 Bow waves V-shaped pattern made by overlapping crest V-shaped pattern made by overlapping crest Slide 13 Shock Waves Produced by supersonic aircraft, three-dimensional cone shaped Sonic boom sharp crack heard when conical shell of compressed air that sweeps behind a supersonic aircraft reaches listeners on the ground below. Sonic boom sharp crack heard when conical shell of compressed air that sweeps behind a supersonic aircraft reaches listeners on the ground below.