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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 explosion blows a rock into three parts. Two parts go off at right angles to each other
- A body of mass m is accelerated uniformly from rest to a speed v in a time T
- When you move from equator to pole, the value of acceleration due to gravity (g)
- A particle of mass 100g tied to a string is rotated along a circle of radius 0.5 m
- A total charge of 5µC is distributed uniformly on the surface of the thin walled
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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