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(i) Neeta needs a lens of power - 4.5D for correction of her vision. (a) What kind of defect in vision is she suffering from ? (b) What is the focal length and nature of corrective lens ? (c) Explain with the help of a diagram how this defect can be corrected ? (ii) State the functions of each of the following parts of human eye. (a) Cornea (b) Pupil(c) Iris(d) Retina

Answer»

Solution :(a) MYOPIA or NEARSIGHTEDNESS
(b) `f = 1//D,` so, `f = -1//45 = (-0.22 m)`, CONCAVE LENS


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