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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
- Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively
- The electric potential V at any point (x,y,z) all in meters in space is given by
- In a potentiometer experiment, the balancing with a cell is at length 240 cm.
- A wheel has moment of inertia 5 x 10⁻³ kgm² and is making 20 revolutions per sec
- At absolute temperature, the kinetic energy of the molecules
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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