ICSE BoardEnglish MediumSTD 9PHYSICSReflection of Light2 Marks
Question
The magnification for a mirror is $-3.$ How are $u$ and $v$ related?
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Answer
Magnification of a mirror is
$ m=-\frac{v}{u}$
$\because m=-3$
$\therefore-3=-\frac{v}{u}$
$\therefore v=3 u $
But, u will always be negative
$\therefore v =-3 u$
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