Question

why the picture we take is square if we have the circular lens i will mark it as brainliest

Answer 1

This curiosity about cameras stems from the fact that the camera lens doesn't produce the picture directly. Instead, the lens works in conjunction with another key part of the camera to produce the picture. In older cameras, that other key element is called film. In newer digital cameras, it's known as the image sensor.

As light bounces off of an object you're photographing, that light enters through the camera's lens. The job of the lens is to bend that light and focus it onto the film or the image sensor.

Early camera makers quickly figured out that round lenses did the most efficient job of focusing light onto film. Could a lens be made into a different shape, such as a rectangle? Of course, lenses could be made in any shape, but camera pioneers figured out early on that round lenses created the best images on film.