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Question

For a concave lens, if the magnification has a plus sign, then image is _________ .

A
real and erect
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B
real and inverted
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C
virtual and erect
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D
virtual and inverted
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Solution

The correct option is C virtual and erect
Magnification is given by. m=vu, we know that u is always negative for a concave lens. Given that m is positive then v is negative. According to sign convention, v is negative when the image falls to the left of the optical centre. To the left of the optical centre, we get virtual and erect images.

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