In case of displacement method of lenses, the product of magnification in both cases is

1

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Solution

The correct option is A $1$
$\begin{matrix} m_{1} m_{2} = 1, which is a fact. Here, the lens is moved between the object and the screen. \end{matrix}$
v \& u interchange values between
two positions, a clear image is
formed on the screen.
if, $m_{1} = \frac{v}{u}$ and $m_{2} = \frac{u}{v}$
$m_{1} m_{2} = 1$

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In case of displacement method of lenses, the product of magnification in both cases is

The correct option is A 1m1m2=1, which is a fact. Here, the lens is moved between the object and the screen. v \& u interchange values betweentwo positions, a clear image isformed on the screen.if, m1=vu and m2=uvm1m2=1