Recent content by ricegrad

  1. R

    Could there be a mistake in the textbook solutions?

    Note that the hint you provided as well - "If you are moving towards a source of sound, the speed of sound will be the sum of the speed of sound and your own speed" - does not say to take into account the speed of the emitter. Take into account only the speed of sound (a value that is known)...
  2. R

    Collapsing a wave function by measurement

    Lets say we have a system in a 1D infinite potential well, prepared somehow with the wavefunction: (phi)=C(a-x)x. I understand that if I try to measure the system's energy, I will collapse the system to an eigen state ((psi)=Asin(n pi x/length)+Bcos(n pi x/length)), returning an eigen energy...
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