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Q.

A real object is kept in front of a lens in air. The object is a linear extended object with its length perpendicular to the optical axis of lens. With reference to different cases of image formation by lens, choose the possible correct option(s):

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a

If length of image is the same as that of object then image is virtual and power of lens is negative

b

If the magnification of the image is +0.5 then image is virtual and power of lens is negative

c

If the image has a magnification –2.5 then image is real and power of lens is positive

d

If length of image is the same as that of object then image is real and power of lens is positive.

answer is A, B, C.

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A real object is kept in front of a lens in air. The object is a linear extended object with its length perpendicular to the optical axis of lens. With reference to different cases of image formation by lens, choose the possible correct option(s):