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Light Reflection and Refraction
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23/08/2021 8:18 pm
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A doctor has prescribed a corrective lens of power, -1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
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23/08/2021 8:20 pm
P = -1.5 D
P = \(\frac{1}{f}\)
f = \(\frac{1}{P}\) = \(\frac{1}{-0.5}\)
= -0.66 m = -66.6 m.
Since focal length is negative, it is a diverging lens.