A plano-convex lens of curvature of 30 cm and refractive index 1.5 produces a real image of an object kept 90 cm from it. What is the magnification?
A plano-convex lens of curvature of 30 cm and refractive index 1.5 produces a real image of an object kept 90 cm from it. What is the magnification?
A. 4
B. 0.5
C. 1.5
D. 2
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Correct Answer - D
We have, `(1)/(v)-(1)/(-90)=(1)/(f)rArr (1.5-1)((1)/(30))=(1)/(60)`
`therefore " " v=180 cm`
`therefore " " |m|=|(v)/(u)|=(180)/(90)=2.0`
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