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Lenses for NEET: 31 solved questions

Real NEET paper questions on lenses, part of ray optics and optical instruments. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1988 to 2023. No sign-in needed to read them.

What this topic asks

• Combinations and silvered lenses — 14 questions
• Lens maker's formula and power — 11 questions
• Lens formula and magnification — 6 questions

All 31 questions with solutions

• A lens is made up of 3 different transparent media as shown in the figure. A point object O is placed on its… NEET 2023 Manipur
• An object is mounted on a wall. Its image of equal size is to be obtained on a parallel wall with the help of… NEET 2023 Manipur
• In the figure shown here, what is the equivalent focal length of the combination of lenses? Assume that all l… NEET 2023
• Two thin lenses are of same focal lengths (F), but one is convex and the other one is concave. When they are… NEET 2023
• A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.… NEET 2022
• A concave mirror of focal length f₁ is placed at a distance of d from a convex lens of focal length f₂. A bea… CBSE AIPMT 2012
• A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis… NEET 2021
• A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror w… NEET 2021
• A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we… NEET 2020
• The power of a biconvex lens is 10 D and the radius of curvature of each surface is 10 cm. Then, the refracti… NEET 2020
• An equi-convex lens has power P. It is cut into two symmetrical halves by a plane containing the principal ax… Odisha NEET 2019
• A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is doubled of the… Odisha NEET 2019
• Two similar thin equi-convex lenses, of focal length f each, are kept co-axially in contact with each other s… NEET 2019
• Two identical glass (μ_g=3/2) equi-convex lenses of focal length f each are kept in contact. The space betwee… NEET 2016
• Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm… AIPMT 2015
• A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other.… NEET 2013
• When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of… CBSE AIPMT 2012
• A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describe bes… CBSE AIPMT 2011
• A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter d… CBSE AIPMT 2010
• A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal le… CBSE AIPMT 2008
• Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is CBSE AIPMT 2008
• A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combin… CBSE AIPMT 2006
• A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then… CBSE AIPMT 2003
• An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let f, f', f''… CBSE AIPMT 2003
• A body is located on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a… CBSE AIPMT 2002
• A planoconvex lens is made of a material of refractive index μ=1.5. The radius of curvature of curved surface… CBSE AIPMT 2000
• A planoconvex lens is made of material of refractive index 1.6. The radius of curvature of the curved surface… CBSE AIPMT 1999
• A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other s… CBSE AIPMT 1998
• A convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined together. What will… CBSE AIPMT 1996
• A lens is placed between a source of light and a wall. It forms images of area A₁ and A₂ on the wall, for its… CBSE AIPMT 1995
• Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid… CBSE AIPMT 1988