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The image A depicts the light observed coming from a star that is not moving relative to the observer. Image B,C, and D depicts light that is observed from an identical star that is moving relative to the observer.



A) Which of the other diagrams depicts a star that could be moving towards the observer? Explain your answer.



B) Which of the diagrams depicts a star that could be moving away from the observer? Explain your answer.



C) The light from the star in image D does not seem to be different than that star in image A, but the star in Image D is moving. Explain how the star might be moving such that this might be the case.



D) The diagram below shows absorption spectra for the stars shown in the image above. Consider just stars from images A, B, and C. Match the star with the absorption spectrum that is most likely to be observed from the star based on the motion of the star.

Star A ____ Star B_____ Star C______

Sagot :

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