Doubtful, eh, though a humorous take. I had the notion that the reason you see yoda, anakin, and obi-wan was because they had left such an impression on the force. Super powerful jedi, lots of effects on the galaxy. What you as the viewer (through the lens of the character) are seeing is the force itself, in its ‘mysteries’ and movements, with the image of those people, rather like if you were looking at a pool of water and see a shape of a person on the surface after a person shaped rock had been dropped in.