a person needs a lens of power -4.5 D for correction of his vision. what kind of defect in vision is he suffering from? what is the focal length of the corrective lens? what is the nature of the corrective lens?
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He us suffering from myopia
Power of a lens = 1/focal length (in meter)
To correct this he can use concave lens
Power of a lens = 1/focal length (in meter)
To correct this he can use concave lens
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