How Do Cameras Take Pictures?
The human eye is actually a form of camera. When you look around, your eyes actually 'take pictures' of the things that you see. The lens in your eye acts like the lens in a camera. The retina of your eye acts like a film in your camera.
In a camera light acts on a specially prepared sensitive surface of the film. If light didn't have any effect on certain chemically prepared substances, photography would be impossible.
When we open and close the shutter of a camera quickly, light comes in and strikes the film. When this happens, a chemical reaction takes place on the film. Certain tiny grains of silver bromide undergo a change.
The film is taken out of the camera and treated with various chemicals to make the print visible and prevent further changes when exposed to light.
Digital cameras are a recent development. They convert the image they receive into electrical signals that are stored. These signals can then be read by computer and used to produce a picture on the screen, which can then be printed out.
Credit : Tell Me how?
Disclaimer: "The views/contents expressed in this article are the sole responsibility of the author(s) and do not necessarily reflect those of Modern Ghana. Modern Ghana will not be responsible or liable for any inaccurate or incorrect statements contained in this article."