Just like destroying an ant colony with a magnifying glass, there’s nothing like cooking hot dogs and roasting marshmallows with a nice parabolic reflector ... cardboard was cut out and pieced ...

This focussing effect is very strong with WAVELENGTHs less than the aperture of the reflector, making it particularly suitable for recording high frequency sounds such as birdsong. Schematic diagram ...

Parabolic reflectors for solar applications are nice ... The idea is so simple that it´s almost like cheating. Cut a circle of mylar slightly larger than the lid, and tape it all around, taking ...

Parabolic space heaters are a type of infrared heater that use a parabolic reflector to aim the heat in a concentrated beam.