Question:medium
An optician prescribes a lens of power +2.5 D. The focal length of the lens in water is (Indices: Lens = 1.5, Water = 1.33):
An optician prescribes a lens of power +2.5 D. The focal length of the lens in water is (Indices: Lens = 1.5, Water = 1.33):
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Denser medium ⇒ weaker lens ⇒ longer focal length.
Updated On: May 1, 2026
- 40 cm
- 2660/17 cm
- 17/2660 cm
- 3000/17 cm
- 17/3000 cm
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The Correct Option is B
Solution and Explanation
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