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MCQBeginnerTelescopes, Observing & Instrumentation
USAAAO — 2025 First Round
Question 30
What is the focal ratio of a telescope with 1.2 m in focal length and 12 cm in aperture?
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Source
USAAAO 2025 First Round, Question 30. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs.