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← HistoryWhich observational consequence results from atmospheric refraction during astronomical observations at low angles, specifically at sunrise/sunset, with astrolabes?
A)Stars appear fainter due to reduced intensity
B)Celestial objects appear higher than actual✓
C)Spectral lines shift to blue end
D)Rapid scintillation due to turbulence
💡 Explanation
When observing at low angles toward the horizon, atmospheric refraction occurs because light bends as it enters denser air, causing celestial objects to appear higher in the sky than they actually are. Therefore, the apparent altitude increases rather than fading intensity, shifting spectra, or causing twinkling, which involve different optical phenomena and light paths.
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