Geometrical optics — for a thin convex lens of focal length f, if f₁ and f₂ are the distances from the optical centre to two conjugate points P₁ and P₂ respectively, which relationship is correct?
Civil Engineering
Surveying
Difficulty: Easy
Choose an option
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Af = f₁ + f₂
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Bf = (f₁ f₂)/(f₁ + f₂)
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C1/f = 1/f₁ + 1/f₂
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Dnone of these
Answer
Correct Answer: none of these