noopur needs a lens of -4.5 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 the corrective lens
noopur needs a lens of -4.5 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 the corrective lens
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Answer:
a) Myopia
b) f =
=>
=> -0.222cm
Concave lens
d) Causes – i) Due to excess curvature of eye lens
iii) Elongation of the eye ball