Two thin lenses of focal lengths 20 cm and 25 cm are placed in contact. The power of the…
Physics · JEE Main · NTA Exams — Optics
Two thin lenses of focal lengths 20 cm and 25 cm are placed in contact. The power of the combination is
- 0.5 D
- 9 D
- 5 D
- 4.5 D
Answer
(B) 9 D
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