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A convex lens is placed between an objec...

A convex lens is placed between an object and a screen which are at a fixed distance apart for one position of the lens. The magnification of the image obtained on the screen is `m_(1)`. When the lens is moved by a distance d the magnification of the image obtained on the same screen `m_(2)`, Find the focal length of the lens.

A

`(d)/((m_1 - mu_2))`

B

`(d)/((m_1 + m_2))`

C

`d m_1/m_2`

D

`d m_2/m_1`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-GEOMETRICAL OPTICS-ADDITIONAL PRACTICE EXERCISE (LEVEL-II PRACTICE SHEET (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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