A certain line in the spectrum of the light from a nebula has a wavelength of 656 nm instead of the 434 nm measured in the laboratory. If the nebula is movingr radially what is its speed relative to the Earth?

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A certain line in the spectrum of the light from a nebula has a wavelength of 656 nm instead of the 434 nm measured in the laboratory. If the nebula is movingr radially what is its speed relative to the Earth?

5.3 A spaceship moves with speed V relative to an observer O, on a straight line
which passes very near the observer. A source on the spaceship emits light of
wavelength 2o = 500 nm in the frame of reference of the spaceship. For what range
of the spaceship's speed will the light be visible to the observer? The wavelengths of
visible light stretches from 24 = 400 nm to ¿g = 700 nm, approximately.
Ans.: –0.22 <B<0.33
5.3.2 The General Doppler Effect
Let a light source emit pulses with a period of To in its own frame of reference. We
choose the axes of another frame of reference S so that the source moves, in the xy
plane, with velocity V = Vå in this frame. At some moment, the source is at a point
Transcribed Image Text:5.3 A spaceship moves with speed V relative to an observer O, on a straight line which passes very near the observer. A source on the spaceship emits light of wavelength 2o = 500 nm in the frame of reference of the spaceship. For what range of the spaceship's speed will the light be visible to the observer? The wavelengths of visible light stretches from 24 = 400 nm to ¿g = 700 nm, approximately. Ans.: –0.22 <B<0.33 5.3.2 The General Doppler Effect Let a light source emit pulses with a period of To in its own frame of reference. We choose the axes of another frame of reference S so that the source moves, in the xy plane, with velocity V = Vå in this frame. At some moment, the source is at a point
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