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Offline Centres

An inverted image is formed at a distance of 40 cm in front of a concave mirror when an object with a height of 12 cm is placed in front of the mirror. Which of the following statements is correct if v represents the image distance and h represents the object's height?

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v= +40 cm, h= +12 cm

v= -40 cm, h= +12 cm

v= -40 cm, h= -12 cm

v= +40 cm, h= -12 cm

answer is B.

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Detailed Solution

According to the new cartesian sign convention, when the distance is measured on the left side or in front of the mirror, it is taken as negative.
The height measured above the principal axis is considered positive.

Sign Convention for Mirrors | Definition, Examples, Diagrams

Therefore, the image distance will be -40 cm and the height of the object will be +12 cm.

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