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MHT CET202410 May 2024Evening ShiftPhysicsRay OpticsActual

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm . The power of combination is

Options

  1. A-1.5 D
  2. B-6.5 D
  3. C+6.5 D
  4. D+1.5 D

Correct answer

A. -1.5 D

Step-by-step solution

aligned & P = I f = 1 f ₁ + 1 f ₂ & P = 1 0.4 + 1 -0.25 = 10 4 - 100 25 =2.5-4=-1.5 D aligned

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