![If the power of a lens is – 2 D, what is its focal length?](https://www.gkseries.com/blog/wp-content/uploads/2022/05/If-the-power-of-a-lens-is-–-2-D-what-is-its-focal-length.png)
Q. If the power of a lens is – 2 D, what is its focal length?
A. +50 cm
B. -100 cm
C. -50 cm
D. +100 cm
Answer: -50 cm
A. +50 cm
B. -100 cm
C. -50 cm
D. +100 cm
Answer: -50 cm
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