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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctMediumDiagram reading

JEE Main 9 April 2024, Shift 2, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

The following figure represents two biconvex lenses L1L_1 and L2L_2 having focal length 1010 cm and 1515 cm respectively. The distance between L1L_1 & L2L_2 is :

The figure, in words

Two biconvex lenses L1 (left) and L2 (right) on a common principal axis (dashed). A ray parallel to the axis, above it, hits L1, refracts down and crosses the axis between the lenses, hits L2 below the axis and emerges parallel to the axis.
  1. (1)1010 cm
  2. (2)1515 cm
  3. (3)2525 cmOfficial answer
  4. (4)3535 cm

Official answer

Option 3

NTA final key.

Chapter
Ray Optics and Optical Instruments
Topic
Lens Maker's Formula
Idea tested
Afocal Lens System

Same topic in other shifts

All Lens Maker's Formula questions
  1. 2 Apr 2026, Shift 2 · Q49If sunlight is focused on a paper using convex lens, it starts burning the paper in shortest time when the lens is kept at 30 cm above the…EasyNumerical value
  2. 4 Apr 2026, Shift 2 · Q41A convex lens is made from glass material having refractive index of 1.4 with same radius of curvature on both sides. The ratio of its…EasySingle correct
  3. 5 Apr 2026, Shift 2 · Q40A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for this…EasySingle correct
  4. 5 Apr 2026, Shift 2 · Q41An object ABAB is placed 15 cm on the left of a convex lens PP of focal length 10 cm. Another convex lens QQ is now placed 15 cm right…MediumSingle correct
  5. 8 Apr 2026, Shift 2 · Q30A thin biconvex lens is prepared from the glass (μ=1.5\mu = 1.5) both curved surfaces of which have equal radii of 20 cm each. Left side…MediumSingle correct
  6. 2 Apr 2025, Shift 1 · Q41A slanted object AB is placed on one side of convex lens as shown in the diagram. The image is formed on the opposite side. Angle made by…HardDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.