A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object is:

1. 32

2. 34

3. 28

4. 17

Doubtly Asked 30 Oct 2026 NEET UG 2024 Practice test neet Save WhatsApp Report

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Answer: 3. 28

Key idea: For a telescope in normal adjustment (distant object), \(m=\frac{f_o}{f_e}\).

\(m=\frac{140}{5.0}=28\).

Option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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