THE FAR POINT DISTANCE OF OF A SHORT SIGHTED PERSON IS 1.5 M , FIND THE FOCAL LENGTH , POWER AND NATURE OF TH LENSES NEEDED
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f=-d
f=-1.5m
P=1/-1.5=-0.67D
As power negative......so concave lens
f=-1.5m
P=1/-1.5=-0.67D
As power negative......so concave lens
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