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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
- Wires A and B are made from the same material. A has twice the diameter and three times
- A bullet comes out of the barrel of gun of length 2m with a speed of 800 m/s
- The nuclei of which one of the following pairs of nuclei are isotones?
- An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into
- A copper disc of radius 0.1 m is rotated about its centre, with 10 revolutions
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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