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What is the power of a convex lens of focal length 25 cm?
Answers (1)
Using the formula, $$
\text { Power }= \frac{100}f
$$
where, P = Power of the lens (in diopters, D) and f = Focal length (in cm)
Given data- Focal length = 25 cm
Putting the values in the formula, $$
\text { Power }= \frac{100}{25} = 4D
$$
Therefore, the power of the convex lens is +4 diopters (D). The positive sign indicates that it is a convex (converging) lens.
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