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The focal lengths of the eyepiece and th...

The focal lengths of the eyepiece and the objective of a microscope are 0.3 m and 0.4 and the distance between them is 0.2m . The position of the eyepiece and the objective are so interchanged that the angular magnification of the instrument remains unchanged. What is the new distance between the two lenses ?

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22.56 cm
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