You can focus the invisible light from an electric heater.

Infrared radiation from an electric heater is just another “color” of light. Though you can’t see this light with your eyes, you can focus it with a mirror or a lens and feel the warmth it produces on the back of your hand. From this [...]

Project Ideas

1. Construct an electromagnet.
2. Construct electric cells of various kinds.
3. Construct a copper or nickel plating apparatus and plate a number of objects.
4. Endeavor to rejuvenate a dry electric cell.
5. Use of ammeter and voltmeter in an automobile.
6. Construct an induction coil.
7. Make a model showing how a [...]