Giving your full attention while listening
:)
Answer: Documentary photography. It is a popular form of photography used to chronicle events or environments both significant and relevant to history and historical events as well as everyday life.
Explanation: I'll be putting some pictures in for examples.
A competing device is the Camera Lucida . "Camera Obscura" means "dark room", and the use of a pinhole in a window blind to form an inverted image of an outside scene on an opposite wall of a dark room.
im pretty sure this question should asked in the science department.