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A person needs a lens of power –4.5 D for correction of her vision.
(a) What kind of defect in vision is she suffering from?
(b) What is the focal length of the corrective lens?
(c) What is the nature of the corrective lens?
(a) What kind of defect in vision is she suffering from?
(b) What is the focal length of the corrective lens?
(c) What is the nature of the corrective lens?
a. The person is suffering from .
b. The formula to calculate the Focal length of the corrective lens (\(f\)),
Substitute the known value,
Focal length (\(f\)) \(=\) \(m\)
(Note: Enter your answer with 2 decimal digits and sign, Ex. +0.11 or -0.11)
c. The sign in the focal length shows that it is a .
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