Gadgets and inventions

Gadgets and inventions

1. Cassette

   • Is a storage medium consisting of magnetic tape spooled within a cartridge enclosure.
   • Cassettes can store different types of media, including audio and video.

2. Photography

   • Method to record the image of an object through the light, or related radiation, on a light-sensitive material.
   • The first permanent photoetching was an image produced in 1822

3. Light

   • Electromagnetic radiation that can be detected by the human eye.
   • The main source of light on Earth is the Sun.

4. Telegraph

   • Is the method used for encoding the message be known to both sender and receiver.