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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
- An electric motor operating on a 60 volt D.C supply draws a current of 10 amp.
- The alternating current in a circuit is given by I=50 sin314t. The peak value
- A source of light is placed at a distance of 50 cm from a photocell and the stopping
- A condenser of 250 μF is connected in parallel to a coil of inductance of 0.16 mH
- What is the energy of photon whose wavelength is 6840 Å?
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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