Question

solve this question


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Answer 1

Explanation:

$f = 30cm \\ u = - 12 cm\\ ho = 2.5cm$

We have to find the location of the image (v) and magnitude (m)

Now,

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

$\frac{1}{30} = \frac{1}{v} + \frac{1}{ - 12}$

$\frac{1}{30} = \frac{1}{v} - \frac{1}{12}$

$\frac{1}{30} + \frac{1}{12} = \frac{1}{v}$

$\frac{2 + 5}{60} = \frac{1}{v}$

$\frac{7}{60} = \frac{1}{v}$

$\frac{60}{7} = v$

$8.57 = v$

Now,

$m = \frac{ - v}{u}$

$m = \frac{ - 8.57}{ - 12}$

$m = 0.71 \: ans$