Astronomers must ensure their spectral measurements are accurate by considering various factors, including: Atmospheric interference from Earth's atmosphere Instrument calibration errors Multiple observations to confirm results Why is it important to account for atmospheric interference when analyzing stellar spectra?
Answer
A
Earth's atmosphere absorbs and distorts specific wavelengths.
B
Earth's atmosphere affects radio telescopes.
C
Earth's atmosphere blocks stars' spectral lines.
D
Earth's atmosphere makes measuring very distant objects impossible.
Explanation
Earth’s atmosphere absorbs some wavelengths and can scatter or distort the light that reaches a telescope. These effects can change the observed stellar spectrum, so astronomers account for them to distinguish atmospheric effects from features produced by the star. Choice A, “Earth’s atmosphere absorbs and distorts specific wavelengths,” describes this interference.
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