7.
What type of a lens is used as a 'magnifying glass? How is the object positioned
with respect to this lens? Draw the appropriate ray diagram.
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Both Convex and concave lens can be used as a magnifying glass.
It is not sufficient to know the position of image of an object of lens but it is also required to know size in position of object changes the of the position as well as the size of image changes.
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