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MCQIntermediateTelescopes, Observing & Instrumentation

USAAAO — 2024 First Round

Question 4

Orion is observing the sky with two telescopes that he just made. Orion wrote down that the first telescope has a primary mirror with focal length Fp = 2 m and an eye piece with focal length Fe = 30 mm. However, he does not know the specifications of his second telescope. Given that the full-field image on the left (below) was taken by the first telescope, and the full-field image on the right was taken by the second telescope, which of the following choices could be the specifications of the second telescope?

Figure for USAAAO 2024 question 4

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Source

USAAAO 2024 First Round, Question 4. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs. Official image omitted; consult the cited exam page for the visual prompt.