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In the displacement method a conves lens...

In the displacement method a conves lens is placed in between an object and a screen. If the magnificaiton in the two position are `m_(1) and `m_(2)` (`m_(1)` gt m_(2)` ), and the distance between the two positions of the lens is x, the focal length of the lens is

A

`(x)/(m_(1)+m_(2))`

B

`(x)/(m_(1)-m_(2))`

C

`(x)/((m_(1)+m_(2))^(2))`

D

`(x)/((m_(1)-m_(2))^(2))`

Text Solution

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The correct Answer is:
B
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DISHA PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Exercise -2 : Concept Applicator
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