Question 129: Ray Optics

Question

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

Accepted Answer

$$\begin{aligned}
& \frac{1}{v}-\frac{1}{u}=\frac{1}{f} \
& \frac{1}{v}-\frac{1}{-30}=\frac{1}{10} \
& \frac{1}{v}=\frac{1}{10}-\frac{1}{30}=\frac{3-1}{30}=\frac{1}{15} \
& v=15
\end{aligned}$$
$$\Rightarrow 30 \mathrm{~cm} 	ext { right of third }$$

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: