Unformatted text preview: 2 ) emitted by a typical person this way? c) What is the total energy (energy per unit time, in Watts) emitted by a typical person this way? 4. You detect a spacecraft moving around a distant planet. You are located in the plane of the orbit (edge on to the orbit). You observe that the spacecraft’s radio signal smoothly varies in wavelength between 2.9995 m and 3.0005 m and back over a period of 100 minutes. a) Assume that the radio is broadcasting normally, at a constant wavelength of 3.0000 m. Describe precisely what the spacecraft is doing when the wavelength is 2.9995 m and when it is 3.0005 m. b) Since the variation is regular you can infer that the orbit is circular. Determine the radius of the orbit. c) ±rom the above information calculate the mass of the planet....
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 Spring '11
 wadsley
 Astronomy, Light, orbital semimajor axis

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