A flat mirror that is 0.85m tall is attached to a wall so that its upper edge is 1.7m above the floor. Use the law of reflection and a ray diagram to determine if this mirror will show a person who is 1.7m tall his or her complete reflection. Please help me as I do not know what to do. So tell me if this is correct... Height = 0.85m P = 1.7m Q = ? What does the person's height 1.7m above go into? Please help me as I am seriously confused about this problem and have been stuck on it for hours.