Q.

The image distance (v) for an image formed by a convex mirror :


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a

Is always positive

b

Is always negative

c

Can be both positive and negative depending upon the object distance

d

None of these 

answer is A.

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Detailed Solution

If a convex mirror forms a virtual image, image distance (v) is positive.
A convex mirror always forms a virtual image. A virtual image is formed behind a mirror. According to the sign convention of spherical mirrors, the image formed will always take a positive sign.
 
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