Question

Two convex lenses of focal lengths f1 and f2 are mounted
coaxially separated by a distance. If the power of the
combination is zero, the distance between the lenses is
(a) | f₁ - f₂ | (b) f₁ + f₂
(c) f₁f₂/| f₁ - f₂ | (d) f₁f₂/f₁ + f₂

Answer 1

Answer: b hgt uh dry

Explanation:

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Answer 2

Answer:

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Explanation:

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