Question

how camera captures our image

Answer 1

When you press the button to take a photograph with a digital camera, an aperture opens at the front of the camera and light streams in through the lens. So far, it's just the same as a film camera. ... This light detector is one of two types, either a charge-coupled device (CCD) or a CMOS image sensor.

Answer 2

Cameras have become an integral part of everyday life, growing so popular that just about everyone carries one around around their neck and in their pocket or purse. But for something that has become so ingrained in our lives, not many people understand just how a camera captures an image. The technology behind the camera is based on the properties of light and the process of manipulating that process.