Graphite glow

Passing a small electric current through a mechanical pencil lead causes it to glow brightly for several seconds. Parts Needed: 4 9 V battery 2 Clip leads 1 3 mm mechanical pencil lead

Provided by Little Shop of Physics/Colorado State University

Runtime: 1:16

More Little Shop of Physics videos

Get Science360's video of the day in your mailbox each weekday.

Sign up now!
» More videos about Mathematics, Education, Physics