The power of combination of 2 lens x and y is 5d. If focal length of lens is 15cm calculate focal length of y and nature
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Total power P=P1+P2
P=5d,F1=15cm=0.15m,
P1=1/f1=1/0.15=6.67d
P2=P-P1=-1.67d
F2=1/P2=-0.6m
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