Gadgets and Inventions

Gadgets and Inventions

1. Telephone transmitter

   • This small device transmits through the commercial frequency-modulated band.

2. Photograph

   • Technique of obtaining images by the chemical action of light on a surface with certain characteristics.

3. Gramophone

   • The gramophone was the first system of recording and reproduction of sound that used a flat disk, unlike the phonograph that recorded on a cylinder.

4. long-lasting electric cube

   • This invention is to clean and was used mostly in houses.

Bilder und Dateien der Mindmap