Physics, asked by Anonymous, 1 year ago

Question is attached. Please answer with proper solution and step's. The best answer will be marked BRAINLIEST. Please answer fast.

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Answered by rohitkumargupta

HELLO DEAR,

$\frac{1}{f} = \frac{1}{v} - \frac{1}{u} \\ = > \frac{1}{10} = \frac{1}{ - u} - \frac{1}{u} \\ = > \frac{1}{10} = - \frac{2}{u} \\ = > u = - 20 <br />hence , a real image object must be placed at a distance of 20 cm<br /><br />\\ i \: hope \: its \: help \: you \\ thanks$

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Anonymous: ohk

rohitkumargupta: hello dear

rohitkumargupta: tumne starting se.solution padha

Anonymous: Ya I read but I don't understand which formula you have used

rohitkumargupta: we know 1/f=1/f+1/f

rohitkumargupta: total focal length

rohitkumargupta: phle nikala hai

Anonymous: then why we have add 1/fm

rohitkumargupta: 1/fm is the focal length of the spherical MIRROR

rohitkumargupta: bcz its also a focal length of the mirror

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