Two infinite conducting plates 1 and 2 are separated by a distance $l$. A point charge $q$ is located between the plates at a distance $x$ from plate 1. Find the charges induced on each plate.
I have a particular doubt in this question about why we can't use the method of images. My teacher told me to assume the point charge as an infinite charged plate but I didn't understand why. Would someone help me in clarifying the misconception (if any)? By using the method of images I couldn't get the correct answer.