Mathematics · Lens Formulas and Magnification

A convex lens produces a magnification of -2, when an object is placed at a distance X cm from it. If the image distance is 40 cm, then what is the value of X?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1-20 cm✓
2+20 cm
3+80 cm
4-80 cm

Correct answer

-20 cm

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A convex lens produces a magnification of -2, when an object is placed at a distance X cm from it. If the image distance is 40 cm, then what is the value of X?

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A convex lens produces a magnification of -2, when an object is placed at a distance X cm from it. If the image distance is 40 cm, then what is the value of X?

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