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If I1 and I2 be the sizes of the images ...

If `I_1` and `I_2` be the sizes of the images respectively, for the two positions of the lens in the displacement method, then the size of the object is given by :

A

`I_1I_2`

B

`sqrt((I_1I_2))`

C

`I_2//I_1`

D

`sqrt((I_2//I_1))`.

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