What is the optical power of glasses with a convex lens if the focal length is 20cm?
| September 20, 2021 | education
Data: F (focal length of the indicated glasses) = 20 cm = 0.2 m.
Optical power (we take into account that the lens is convex (collecting)): D = 1 / F = 1 / 0.2 = 5 diopters.
Answer: The optical power of these glasses is 5 diopters.
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