Question
What is the focal length of a makeup mirror that has a power of $1.50 \mathrm{D}$ ?
Step 1
The power \( P \) of a lens or mirror is given by the formula: \[ P = \frac{1}{f} \] where \( P \) is the power in diopters (D) and \( f \) is the focal length in meters. Show more…
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