Find the distance of the final image from the second lens. Given \(f_1 = 10\,\text{cm}\), \(f_2 = 15\,\text{cm}\). The object is placed \(15\,\text{cm}\) to the left of the first lens and the separation between the lenses is \(15\,\text{cm}\). 
Thin symmetric prism of $\mu = 1.5$. Find ratio of incident angle and minimum deviation.