Find the distance of the image from object O, formed by the combination of lenses in the figure:

Question

Find the distance of the image from object O, formed by the combination of lenses in the figure: <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/667b3ffc7d7b3834dd39eb2dc36617df-.png" /> (A) 75 cm (B) 10 cm (C) 20 cm (D) infinity

Tardigrade Admin · Accepted Answer

(1/ V 1)+(1/30)=(1/10) (1/ V 1)=(2/30) ⇒ V 1=15 cm (1/ V 2)-(1/10)=-(1/10) (1/ V 2)=0 V 2=∞ V 3=30 cm OV 3=75 cm

Q. Find the distance of the image from object $O$ , formed by the combination of lenses in the figure :

75 cm

10 cm

20 cm

infinity

$\frac{1}{V _{1}} + \frac{1}{30} = \frac{1}{10}$
$\frac{1}{V _{1}} = \frac{2}{30}$
$\Rightarrow V_{1} = 15 c m$
$\frac{1}{V _{2}} - \frac{1}{10} = - \frac{1}{10}$
$\frac{1}{V _{2}} = 0$
$V_{2} = \infty$
$V_{3} = 30 c m$
$O V_{3} = 75 c m$

Q. Find the distance of the image from object O, formed by the combination of lenses in the figure :