st","extracted_subject":"PHYSICS","extracted_chapter":"RAY OPTICS AND OPTICAL INSTRUMENTS","extracted_topic":"OPTICAL INSTRUMENTS","questionPreviewUrl":"https://cdn.pureessence.tech/question-previews/packed_canvases/canvas_740.png?top_left_x=1064&top_left_y=1603&width=532&height=270&app=solveeit"},"seo_metadata":{"keywords":[]},"doubt_solver_data":{"concept_summary":[]},"embeddings":[],"is_hidden":false,"_id":"66d23c9070136192204bf428","slug":"the-magnifying-power-of-a-telescope-is-9-when-it-i","content":"The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye-piece is found to be 20 cm. The focal length of the two lenses are","options":[{"_id":"68aad2dd7f15af4716ddca8f","text":"18 cm, 2 cm","sequence":0,"isCorrect":true},{"_id":"68aad2dd7f15af4716ddca90","text":"11 cm, 9 cm","sequence":1,"isCorrect":false},{"_id":"68aad2dd7f15af4716ddca91","text":"10 cm, 10 cm","sequence":2,"isCorrect":false},{"_id":"68aad2dd7f15af4716ddca92","text":"15 cm, 5 cm","sequence":3,"isCorrect":false}],"correct_answer":"18 cm, 2 cm","explanation":"![](https://cdn.pureessence.tech/canvas_666.png?top_left_x=1412&top_left_y=0&width=137&height=300)= 9\n\nf_o + f_e = 20\n\nf_o = 9f_e\n\nf_e + 9f_e = 20\n\nf_e = 2cm\n\nf_o = 18","question_type":"single_choice","appeared_in":[],"created_at":"2024-08-30T21:41:36.105Z","__v":0,"vector_store_id":"9cc3bc62-7fc8-48ef-8694-f3899ab1ffe2","updated_at":"2024-08-30T21:41:36.105Z","isStarred":false},"params":{"questionSlug":"the-magnifying-power-of-a-telescope-is-9-when-it-i"}}]}]]

Question: The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance betwee...

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