Find the magnification for the lens. The foca | vedclass

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(B) From the given image,the object distance is $u = -20 \; cm$ and the focal length of the convex lens is $f = +25 \; cm$.Using the lens formula:$\fr

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$5$

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(B) From the given image,the object distance is $u = -20 \; cm$ and the focal length of the convex lens is $f = +25 \; cm$.Using the lens formula:$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$Substituting the values:$\frac{1}{v} - \frac{1}{-20} = \frac{1}{25}$$\frac{1}{v} + \frac{1}{20} = \frac{1}{25}$$\frac{1}{v} = \frac{1}{25} - \frac{1}{20}$$\frac{1}{v} = \frac{4 - 5}{100}$$\frac{1}{v} = -\frac{1}{100}$$v = -100 \; cm$The magnification $m$ is given by:$m = \frac{v}{u}$$m = \frac{-100}{-20}$$m = 5$

Find the magnification for the lens. The focal length is $25 \; cm$.

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