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MCQIntermediateLight, Radiation & Spectroscopy
BAAO — 2018 Astronomy & Astrophysics Challenge
Question 5
The three stars that make up Orion's belt are Alnitak, Alnilam and Mintaka, with apparent magnitudes, m, of 1.77, 1.69 and 2.23 respectively. What is the ratio of the apparent brightnesses of the two brightest stars?
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2018. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.