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MHT CET202416 May 2024Evening ShiftPhysicsRay OpticsActual

An optician makes spectacles having a combination of a convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm . The power of this combination of lenses in dioptre is

Options

  1. A-6.67
  2. B-1.5
  3. C+6.67
  4. D+1.5

Correct answer

B. -1.5

Step-by-step solution

P= 1 f For combination of lenses, P = P ₁+ P ₂ Given: P ₁=2.5 D and P ₂=-4 D P=-1.5 D

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