Q.

Is it true that, on the basis of Cartesian sign the height of a real mage is positive and the height of a virtual image is negative?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
According to the sign convention for reflection by spherical mirrors, the distances measured perpendicular to and above the principal axis (along + y-axis) are taken as positive.
The distances measured perpendicular to and below the principal axis (along – y-axis) are taken as negative. Hence,
a) Height of a real image-negative
b) Height of a virtual image-positive
 Question ImageThe correct statement would be, on the basis of Cartesian sign the height of a real mage is negative and the height of a virtual image is positive.
   
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