1. The problem statement, all variables and given/known data A student wants to find the position of an image in a plane mirror. She sets up the plane mirror with a pin placed vertically a few centimetres in front of it. To find the image the student looks into the mirror at an angle a little further along the mirror. She can see the image of the object pin in the mirror and places two "sighting pins" in line with the image in the mirror. The student repeats the process from a doughty slightly different angle, again putting in two sighting pins. Q1. How can the student use the position of the sighting pins to find the position of the image? Q2. How can the position of the sighting pins be used to show that the angle of incidence equals the angle of reflection? Q3. How can the student checked that she has marked the position of the image correctly? Q4. Would this method for finding the image work with a curved mirror? 2. Relevant equations 3. The attempt at a solution I haven't got a clue to the answers. I know no one will just give me the answers and I'm happy to deduce the answers myself if someone can guide me. Thank you. Pythagoras comes to mind but did not help.