Technically, it’s a type of perspective distortion – and you see it all the time with wide-angle lenses. So it’s the lens’ ...

The centre of the lens is called the optical centre C. In a ray diagram, a converging lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens. Point the lens ...

Convergent evolution occurs when organisms that aren’t closely ... Light enters through an opening. Then a lens focuses it onto a layer of light-detecting cells at the back of the eye called the ...