Question

calculate the distence of an object from pole if the distance of an image from pole is 5 cm and focus length is 10 cm​

Answer 1

Answer:

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

$\frac{1}{v} - \frac{1}{ - 15} = \frac{1}{f}$

OR

$\frac{1}{v} = \frac{1}{ - 15} + \frac{1}{10}$

OR

V = 30cm

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