1. The problem statement, all variables and given/known data What is meant by this: "When mirroring a source in a plane mirror, it looks like the rebounding light rays come from a virtual source at the back of the mirror." I will illustrate this with a question: The figure shows a light source A, from an ordinary light bulb, that transmits rays in all directions. two of those light rays (r1 and r2) are drawn You also see a mirror. The (specular) front you will find on the side of the light source. The drawing is a top view of the situation, otherwise said: we concentrate on the directions in the plane in which we draw and forget the space in which we ourselves. -The rebounding rays are portions of whole lines. Draw those entire lines, so even the pieces on the back of the mirror and mark the point of intersection. -That marked point of intersection has a special position with respect to the light source! What position is that? Show the validity of your claim. 2. Relevant equations mirrors, Snellius 3. The attempt at a solution Trying to understand... What is meant by rays on the back of the mirror? What type of 'special position' is meant here?