# Why doesn't the method of images work for this problem?

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.