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Lenses, Lens Combinations & Silvered Lenses 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 123 questions
- MCQmediumGeometrical optics
The equiconvex lens shown in the original figure is silvered on one side. Its μ and the radius magnitude of each curved surface is R. For what object distance from the lens will the image be formed on the object itself.
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JEE Main 2025 (Online) 22 jan morning Shift
Open question & full solution → - MCQmediumGeometrical optics
Plane surface of a thin planoconvex lens reflects 50% of light, while the curved surface is completely transparent, if final image of ‘O’ after refraction through thin lens coincides with the image formed due to partial reflection from plane surface. If distance between O and lens is x (in m) then find the value of x/4.
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JEE Mains
Open question & full solution → - MCQeasyGeometrical optics
The power of a biconvex lens is 10 D and the radius of curvature of each surface is 10 cm. Then the refractive index of the material of the lens is:
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NEET 2020NEET Previous Year
Open question & full solution → - MCQeasyGeometrical optics
An equiconvex lens has power P. It is cut into two symmetrical halves by a plane containing the principal axis. The power of one part will be:
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NEET 2019NEET Previous Year
Open question & full solution → - MCQmediumGeometrical optics
Two identical thin biconvex lenses of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is filled with a liquid of refractive index 1.25. The focal length of the combination is _________cm.
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JEE Mains 2022
Open question & full solution → - IntegermediumGeometrical optics
A convex lens of refractive index 1.5 and focal length f = 18 cm is immersed in water. The difference in focal lengths of the given lens when it is in water and in air is α × f. The value of α is ________.
(refractive index of water = 4/3)
JEE Mains 202628 January Morning Shift
Open question & full solution → - MCQmediumGeometrical optics
A lens of refractive index 1.6 has focal length 12 cm in air. Find its focal length when placed in water of refractive index 1.28.
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JEE Mains 2025 7 April Morning Shift
Open question & full solution → - MCQdifficultGeometrical optics
Sunlight of intensity 1.3 kW m⁻² is incident normally on a thin convex lens of focal length 20 cm. Ignore the energy loss of light due to the lens and assume that the lens aperture size is much smaller than its focal length. The average intensity of light, in kW m⁻², at a distance 22 cm from the lens on the other side is__________.
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JEE Advanced 2018
Open question & full solution → - MCQdifficultGeometrical optics
An equiconvex lens of refractive index μ and radius of curvature R has its one surface silvered. A point source O is placed before the silvered lens so that its image is coincident with it, the distance of the object from the lens is :
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JEE Advanced
Open question & full solution → - MCQmediumGeometrical optics
An object is placed at a distance of 12 cm from a convex lens. A convex mirror of focal length 15 cm is placed on other side of lens at 8 cm as shown in the figure. Image of object coincides with the object. When the convex mirror is removed, a real and inverted image is formed at a position. The distance of the image from the object will be ........(cm)
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JEE Mains
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