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lens and combination lens,silvered lens questions with solutions
Practice Geometrical optics for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 96 questions
- MCQmediumGeometrical optics
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens. If the lens is removed, the point where the rays meet will move 5 cm closer to the mounting that holds. Find the focal length (in cm) of the lens without sign.
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JEE MainsJEE Advanced
Open question & full solution → - MCQmediumGeometrical optics
Find the equivalent power of the thin-lens combination shown in the original figure. The figure indices are μ₁=4/3, μ₂=3/2 and μ₃=4/3, and the surface radii are R₁ and R₂.
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JEE Main 2025 (Online) 22 jan morning Shift
Open question & full solution → - MCQmediumGeometrical optics
A 2 meter long scale with least count of 0.2 cm is used to measure the locations of objects on an optical bench. While measuring the focal length of a convex lens, the object pin and the convex lens are placed at 80 cm mark and 1 m mark., respectively. The image of the object pin on the other side of lens coincides with image pin that is kept at 180 cm mark. The % error in the estimation of focal length is:
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JEE Mains6 April 2023Shift 2Evening Shift
Open question & full solution → - NumericmediumGeometrical optics
As shown in the figure, a combination of a thin plano concave lens and a thin plano convex lens is used to image an object placed at infinity. The radius of curvature of both the lenses is 30 cm and refraction index of the material for both the lenses is 1.75. Both the lenses are placed at distance of 40 cm from each other. Due to the combination, the image of the object is formed at distance x = _______ cm, from concave lens.
JEE Mains24 January 2023Shift 1Morning Shift
Open question & full solution → - MCQmediumGeometrical optics
A concave-convex glass lens has refractive index 1.5 and surface radii 30 cm and 20 cm as shown in the original figure. Its concave surface is filled with a liquid of refractive index 1.3. the focal length of the liquid-glass combination is:
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JEE Mains 2025 8 April Evening Shift (Shift 2)
Open question & full solution → - Multi-correctmediumGeometrical optics
Figure shows a convex lens cut symmetrically into two equal halves and separated laterally by a distance h. A point object O placed symmetrically at a distance 30 cm, from the lens halves, forms two images separated by a distance d. A plot of d versus h is shown in figure. The focal length of the lens is :-
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JEE MainsJEE Advanced
Open question & full solution → - MCQeasyGeometrical optics
The following figure represents two biconvex lenses L₁ and L₂ having focal length 10 cm and 15 cm respectively. The distance between L₁ & L₂ is :
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JEE Mains 2024 09 Apr Evening Shift
Open question & full solution → - MCQmediumGeometrical optics
The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two different positions between the screen and the object. The distance between these two positions is 40 cm. If the power of the lens is close to 100 N D where N is an integer, the value of N is________.
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JEE Mains 2020
Open question & full solution → - IntegermediumGeometrical optics
A biconvex lens of focal length 10 cm is cut into two identical parts by a plane perpendicular to its principal axis. Find the power of each part in dioptres.
13 April 2023 Evening Shift
Open question & full solution → - MCQmediumGeometrical optics
The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used ?
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JEE Mains
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