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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
- At which place, Earth’s magnetism becomes horizontal
- The horizontal component of earth’s magnetic field at a place is 3×10⁻⁴ T
- A lead bullet of 10 gm travelling at 300 m/s strikes against a block
- Electric field intensity at a point in between two parallel sheets due to like
- A stone of mass 1kg is tied to a string 4m long and is rotated at constant speed
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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