 |
Types and shapes of surfaces and membranes
A balloon is a good example of a surface. When we say surface that
only includes the outside of the balloon and not the air inside.
|
Just like the outside of a balloon is a round surface, the outside
of a ping-pong ball is also a round surface. But the surfaces formed
by soap bubbles are much more interesting. They can stick together
to form complicated shapes and are also wobbly and a little springy.
|
![[Picture of soap bubble]](../images/bubble_306x222.jpg)
|
![[Picture of soccer ball]](../images/soc_ball.gif)
|
You can see how springy surfaces can be by thinking about how a
soccer ball bounces. The soccer ball is much stronger than a
soap bubble which pops easily if you touch it.
|
In the next few pages we will take a closer look at soaps and the many
types of surface they form.
|
