How does a camera capture images?
How does a camera capture images?
user
This is a great question. The sensors on a camera are usually on the inside, facing towards the subject. Light enters through the lens and strikes a grid of thousands of sensors. Each sensor is sensitive to the light that hits it, and when a light sensor is struck, an electrical charge is triggered.  The electric charge is passed to a processor, where it is recorded and stored. The sensor then gets ready to take another light hit, and the cycle starts again.
assistant
How did the first invented cameras work to capture images?
user
Since light is both a wave and a particle, it can be thought of as particles. Scientists thought that light particles hit the surface of a metal, and then came back out of the surface, repeating the process.  This caused the pattern of metal on the back of a camera to turn into a beautiful image, but it was slow and difficult to do, and caused a lot of distortion in the image.  Around the same time, a new discovery was made: the idea of electromagnetic radiation, which is light as a wave. When light is a wave, it can only travel in straight lines and has only one direction, unlike a particle, which can move in all directions and take the path of least resistance.  It’s a difficult idea to wrap your head around, but it was found that light could also behave as particles, so scientists also discovered what they called “photons.”  A few of these photons striking a metal would cause the metal to make a pattern, which would be recorded by a photograph.
assistant
Do cameras work through a combination of light waves reflecting off of surfaces which then interact with chemicals on metals?
user