Physics · Ray Optics
The total length of an astronomical telescope adjusted for normal view (final image formed at infinity) is 20 cm. If its angular magnification is 4, the focal length of the objective lens (fo) and the eyepiece lens (fe) are respectively:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 15 cm, 20 cm
- 216 cm, 4 cm✓
- 34 cm, 16 cm
- 420 cm, 5 cm
Correct answer
16 cm, 4 cm
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