Click to see a (120Kb) video of the "Incredible Hand Shaking Exercise".

What type of mirror is used?

Describe the image using adjectives "virtual, real, magnified, reduced, upright, inverted.

Describe where the focal point of this mirror is relative to the person's hand. (Eg is the hand on the focal point of the mirror, is it two focal lengths away?). Explain your answer.

A real image can be produced using this set of mirrors. Click to see the 120Kb video of the virtual pig. A toy pig appears at the top of the mirror. A person can run their finger through it without disturbing the pig. It is only an illusion.

How is the image of the pig created? Note how the two concave mirrors are set up.