Question

focal length{f} = 10cm
object distance=-25
image distance=?
​

Answer 1

Answer:

Given that,

Object distance, u=−25cm,Focal length,f=10cm

From lens formula,

$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

Then,

$\frac{1}{v} = \frac{1}{f} + \frac{1}{u}$

Then,

$\frac{1}{v} = \frac{1}{10} - \frac{1}{25}$

Then,

$\frac{1}{v} = \frac{5 - 2}{50} = \frac{3}{50}$

Then,

V=16.66cm

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