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Homework Help: Gravitional frequency effect

  1. Dec 7, 2006 #1
    1. The problem statement, all variables and given/known data
    sky tv is broadcast from a satellite in orbit at an altitude of 35600km. By considering the defference between the satellite and the surface of the earth , find the frequency shift of a 1GHz signal broadcast to the earth.
    (i have been given radius and mass of the earth.

    2. Relevant equations
    g=Gm/r^2, f(observed)=f(emit){1 +/- gh/c^2}

    3. The attempt at a solution
    find g
    how do i calculate f(observed)?
  2. jcsd
  3. Dec 7, 2006 #2
    (G*M) / (r * c^2) = (wo - we) / we

    "wo" is the wavelength of the photon as measured by a distant observer.
    "we" is the wavelength of the photon when measured at the source of emission.
    and "r" is distance

    w = c / f (c=speed of light)

    Pooya Afaghi
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