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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
- Number of spectral lines in hydrogen atom is
- During an adiabatic process, the cube of the pressure is found to be inversely
- Electrical force is acting between two charges kept in vacuum. A copper plate
- Two lines of force due to a bar magnet
- An inductor 20 mH, a capacitor 50 μF and a resistor 40Ω are connected in series
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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