P = P₁ + P2 = (+ 6 D) + (-2D) = + 4 D
Class 12 Physics
Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Two thin lenses of power + 6 D and – 2 D are in contact. What is the focal length of the combination?
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P = P₁ + P2 = (+ 6 D) + (-2D) = + 4 D
Class 12 Physics
Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
Here P = P₁ + P2 = (-4 D) + (2 D) = -2D
Hence, f = 1/p = – 1/2 m = -50 cm.
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