A person needs a lens of power _4.5D for coreecting his vision
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Explanation:
data:p=-4.5,f=?
solution f=1/P=1/4.5D
=10/45m=0.22
P is negative this shows that the lense is concaveand the defect is mayopia ( nearsightedness)
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Answer:
Explanation:
Power is negative
find focal length which is 1/p
which is -0.22
focsl length is negative only in concave lens
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