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Calculating moving speaker through two detectors
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[QUOTE="Samuelriesterer, post: 4987931, member: 530097"] [h2]Homework Statement [/h2] A speaker emitting sound at a frequency of 20 Hz is moving in the +x direction between two detectors. The speaker is moving at a speed of 30 m/s and the detectors are wired so that they flash red ([B]λ [/B]= 700 nm) when the pressure is a maximum and green ([B]λ [/B]= 700 nm) when the pressure is a minimum. Use 340 m/s as the speed of sound. [B][1] [/B]Calculate the distance between maxima ahead and behind the moving speaker. [B][2] [/B]Calculate the frequency of the light blinking on each of the detectors. [B][3] [/B]An observer between the detectors is moving at 0.8c in the +x direction. Calculate the frequencies for the red and green lights for each detector this observer sees. [B][4] [/B]Transform the velocity of the speaker to the observer frame as well as the velocity of sound in each direction. [B] 2. Homework Equations [/B] ##f' = f \frac{v \pm v_{receiver}}{v \pm v_{source}}## ##t' = \frac{t}{\sqrt{1-\frac{v^2}{c^2}}}## [h2]The Attempt at a Solution[/h2] I am confused at the start with how the detectors detect maximum and minimum pressure and subsequently question1 about the maxima? [/QUOTE]
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Calculating moving speaker through two detectors
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