Subjective Type

Draw a ray diagram represent the nature , position and relative size of the image formed by a convex lens for the object placed : (a) at $$ 2F_1 $$ (b) between $$ F_1 $$ and the optical centre O of the lens. Which of the above two cases shows the use of convex lens as a magnifying glass ? Give reasons for your choice.

Solution

The case when object is between $$ F_1 $$ and the optical centre O of the lens shows the use of convex lens as a magnifying glass . This is because here the image formed is erect and magnified .

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