1. Look at your reflection
on the inside of the spoon.
on the inside of a spoon bends in
like a cave - it is concave.
Dentist use concave
mirrors to examine your teeth. These
mirrors make your teeth look bigger
so the dentist can examine them
more easily. Likewise, shaving
mirrors are concave because they
make the face look bigger.
2. Now turn
your spoon out and look at your reflection
on the outside of the spoon.
on the outside of a spoon bends out
- it is convex.
The next time you
are at a funfair take a look at
yourself in the crazy mirrors. They
bend in all sorts of ways so that
you look bigger, smaller, fatter,
thinner and even wavy.