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A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 106 m and the radius of the lunar orbit around Earth is 3.8 × 108 m.
  • a)
    10 cm
  • b)
    12.5 cm
  • c)
    15 cm
  • d)
    17.5 cm
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A giant telescope in an observatory has an objective of focal length ...
Since u >> f0, v = f0 = 19 m.
Now u = -3.8 × 108 m.
Therefore, magnification produced by the objective is
∴ Diameter of the image of the moon is 3.5 × 106 × 0.5 × 10-7 = 0.175 m = 17.5 cm
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A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 106 m and the radius of the lunar orbit around Earth is 3.8 × 108 m.a)10 cmb)12.5 cmc)15 cmd)17.5 cmCorrect answer is option 'D'. Can you explain this answer?
Question Description
A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 106 m and the radius of the lunar orbit around Earth is 3.8 × 108 m.a)10 cmb)12.5 cmc)15 cmd)17.5 cmCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 106 m and the radius of the lunar orbit around Earth is 3.8 × 108 m.a)10 cmb)12.5 cmc)15 cmd)17.5 cmCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0 cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 106 m and the radius of the lunar orbit around Earth is 3.8 × 108 m.a)10 cmb)12.5 cmc)15 cmd)17.5 cmCorrect answer is option 'D'. Can you explain this answer?.
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