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Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is
Options
(a) (-20 cm)
(b) (-25 cm)
(c) (-50 cm)
(d) 50 cm
Correct Answer:
(-50 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 elevator car whose floor to ceiling distance is equal to 2.7m starts
- An electron moving in a uniform magnetic field of induction of intensity B,
- A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt
- A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy
- A photon of energy 10.2 eV collide inelastically with hydrogen atom in ground state
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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