P1 Visible light & UV light

Visible light

When light enters your eye, it gets refracted and goes through the lens and gets focused on the retina at the back of the eye. The retina then sends out a message through the optic nerve and the brain interprets this.

Photography works in a similar way. Cameras use a lens to focus visible light onto a light sensitive film or a electronic sensor. 

Aperture- The aperture controls how much light enters the camera. 

Shutter speed- Shutter speed determines how long the film or electric sensor is exposed to the light.

By varying the aperture and the shutter speed, the photographer can control…