A compound microscope consists of an objective lens of focal length 1cm and an eye piece of focal length 5cm with a separation of 10cm. The distance between an object and the objective lens, at which the strain on the eye is minimum is n40cm. The value of n is ____

# A compound microscope consists of an objective lens of focal length 1cm and an eye piece of focal length 5cm with a separation of 10cm. The distance between an object and the objective lens, at which the strain on the eye is minimum is $\frac{\mathrm{n}}{40}$cm. The value of $\mathrm{n}$ is ____

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### Solution:

$Now, \frac{5}{4}=\frac{n}{40}⇒n=50$

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