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Geometrical Optics question

2023 · 6 Apr · Shift 2 · Q49
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  5. /2023 · 6 Apr · Shift 2 · Q49

Geometrical Optics question

2023 · 6 Apr · Shift 2 · Q49

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
A 2 meter long scale with least count of 0.2 cm0.2 \mathrm{~cm}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 cm80 \mathrm{~cm}80 cm mark and 1 m1 \mathrm{~m}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 cm180 \mathrm{~cm}180 cm mark. The %\%% error in the estimation of focal length is:
  1. A
    1.70
  2. B
    0.51
  3. C
    1.02
  4. D
    0.85
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