43) A doctor prescribed a corrective lens with a power -0.25D. Focal length and type of lens is
a)+4m and concave lens
c)-4m and concave lens
b) +2m convex lens
d)-2m convex lens
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43) A doctor prescribed a corrective lens with a power -0.25D. Focal length and type of lens is
a)+4m and concave lens
c)-4m and concave lens
b) +2m convex lens
d)-2m convex lens
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Answer:
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