Question

Question #810f4

Answer 1

The usual method to draw objects and their images in lens questions is to use an arrow starting from the optical axis.

Explanation:

The usual method to draw objects and their images in lens questions is to use an arrow starting from the optical axis. The solution to the location of the image (or virtual image) can be shown using ray tracing diagrams like the following:

There is an excellent explanation of how to construct these diagrams on this website:

Converging Lenses Ray Diagrams