Please find these
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Solution:f=0.3 m=30 cmμ=1.5R1=since, 1f=μ-11R1-1R2Or, 130=1.5-11-1R2Or, 130=-0.5×1R2Or, R2=-0.5×30=-15 cmTherefore, radius of curvature is 15 cm

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