Two Lenses with Refractive Powers of 10 D and 15

question 47

Multiple Choice

Two lenses with refractive powers of 10 D and 15 D are placed in contact. What is the refractive power of the combination?

• A) 15 D
• B) 25 D
• C) 0.67 D
• D) 5.0 D
• E) 1.5 D

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