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The wavelength of light coming from a particular star measures 4 cm. If the rest wavelength of that light is 12 cm, what can I

The wavelength of light coming from a particular star measures 4 cm. If the "rest wavelength" of that light is 12 cm, what can I conclude about the distance between my location and that star? Group of answer choices the distance is increasing the distance is decreasing nothing; Doppler shift gives speed information the distance is unchanging

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