Question 75: Ray Optics

Question

The position of the image formed by the combination of lenses is :
![](https://app-content.cdn.examgoal.net/fly/@width/image/1lv3g7ckm/eb6702e7-ca25-4f11-978e-4c2883375f9d/0b184060-fc86-11ee-97a5-e951feb71c60/file-1lv3g7ckn.png?format=png)

Accepted Answer

$\begin{aligned}
& \frac{1}{v}-\frac{1}{u}=\frac{1}{f} \
& \frac{1}{v}-\frac{1}{-30}=\frac{1}{10} \
& \frac{1}{v}=\frac{1}{10}-\frac{1}{30}=\frac{3-1}{30}=\frac{1}{15} \
& v=15
\end{aligned}$
$\Rightarrow 30 \mathrm{~cm} 	ext { right of third }$
![](https://app-content.cdn.examgoal.net/fly/@width/image/1lw4x7hrm/e9026ee8-ae6a-458d-a98c-a862a57d9e8d/8a54c920-1121-11ef-a3e8-ff0446908720/file-1lw4x7hrn.png?format=png)

Answer

$15 \mathrm{~cm}$ (right of second lens)

Answer

$30 \mathrm{~cm}$ (right of third lens)

Answer

$30 \mathrm{~cm}$ (left of third lens)

Answer

$15 \mathrm{~cm}$ (left of second lens)

Ray Optics

The position of the image formed by the combination of lenses is :

Choose the correct answer: