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An object is placed at a distance of 10 cm from a co-axial combination of two lenses A and B in contact. The combination forms a real image three times the size of the object. If lens B is concave with a focal length of 30 cm. The nature and focal length of lens A is
Options
(a) convex, 12 cm
(b) concave,12 cm
(c) convex, 6 cm
(d) convex, 18 cm
Correct Answer:
convex, 6 cm
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If 20% of a radiactive element decays in 10 days, then amount of original material left
- Light of wavelength 500 nm is incident on a metal with work function 2.28 eV.
- A current of 5 A is passing through a metallic wire of cross-sectional area 4×10⁻⁶ m².
- A metal bar of length L and area of cross-section A is clamped between two rigid
- A particle of mass m, charge Q and kinetic enery T enters a transverse
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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