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A convex lens of focal length 10 cm is placed at a distance of 12 cm from a wall. Calculate the distance from the lens where an object can be placed so as to form its distinct real image on the wall.
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Dec 25, 2021
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A convex lens of focal length 10 cm is placed at a distance of 12 cm from a wall. Calculate the distance from the lens where an object can be placed so as to form its distinct real image on the wall.
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\(v=+12 \mathrm{~cm}, f=+10 \mathrm{~cm} .\)
\(1 / v-1 / u=1 / \mathrm{F}\)
\(=-1 / 12-1 / u=1 / 10\)
\(u=-60 \mathrm{~cm} .\)
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