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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
- Two coils have the mutual inductance of 0.05 H.
- In a vaccum triode the function of grid voltage is
- In a parallel plate capacitor with plate area A and charge Q, the force on one plate
- If the unit of force and length are doubled, then unit of energy will be
- The logic behind NOR gate is that it gives
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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