Light rays reflected from a mirror–an animation showing that angle of reflection equals angle of incidence.
http://www.schoolphysics.co.uk/animations/Light%20and%20optics%20animations/Reflection/index.html
Tricks that may be played with mirrors and their explanations–videos
Mirror challenges–Because of the reversal, tracing a mirror image can be a challenge, but one to which the brain can rapidly adapt with practice. Kids (and adults) have fun with the challenge.
http://students.washington.edu/nbout/LessonPlans/mirrordrawing.pdf
Mirrors in telescopes
Type into your browser: images for telescope mirrors
Refraction telescope diagram
Type into your browser: images for refracting telescope