In which part the cemera senses light?

The camera senses light primarily through its sensor, which can be either a digital sensor (like a CCD or CMOS) or film in traditional cameras. When light enters the camera through the lens, it is focused onto the sensor, where it is converted into an electrical signal. This signal is then processed to create the final image. The sensitivity and response of the sensor to light determine the camera's performance in various lighting conditions.