# Which of the following statements is true? (a) A convex lens with power +4 D has a focal length – 0.25 m. (b) A convex lens with power –4 D has a focal length +0.25 m. (c) A concave lens with power +4 D has a focal length – 0.25 m. (d) A concave lens with power –4 D has a focal length – 0.25 m.

## Question ID - 100028 :- Which of the following statements is true? (a) A convex lens with power +4 D has a focal length – 0.25 m. (b) A convex lens with power –4 D has a focal length +0.25 m. (c) A concave lens with power +4 D has a focal length – 0.25 m. (d) A concave lens with power –4 D has a focal length – 0.25 m.

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Answer Key : (d) -

A concave lens with power –4 D has a focal length – 0.25 m.

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