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Thread: Waves questions from Cambridge physics paper 9702

  1. #1 Waves questions from Cambridge physics paper 9702 
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    I want to ask about question 27 in Cambridge university physics paper 9702/01 of October/November 2008
    https://physics18.weebly.com/uploads..._w08_qp_01.pdf

    and question 30 in Cambridge university physics paper 9702/12 of May/June 2012.
    https://physics18.weebly.com/uploads..._s12_qp_12.pdf

    Is the motion of the transmitter or receiver important?
    Are they both about standing waves and that is why the distance between the neighboring maxima = half of the wavelength?
    Are these questions the same?
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  2. #2  
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    Quote Originally Posted by MichaelMarchenko View Post
    I want to ask about question 27 in Cambridge university physics paper 9702/01 of October/November 2008
    https://physics18.weebly.com/uploads..._w08_qp_01.pdf

    and question 30 in Cambridge university physics paper 9702/12 of May/June 2012.
    https://physics18.weebly.com/uploads..._s12_qp_12.pdf

    Is the motion of the transmitter or receiver important?

    Are these questions the same?
    Yes, the transmitter motion is important since it produces a Doppler effect. Since the question gives you the wavelength, it MASKS the effect. The answer is simply

    Are they both about standing waves and that is why the distance between the neighboring maxima = half of the wavelength?
    The distance between two successive maxima is FULL wavelength, not half.
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