Lens and Images

Different Lenses 

Lenses form images by refracting light and changing its direction.

Converging Lens

• A converging lens is a convex-it bulges outwards.

• causes parallel rays of light to converge (move together) at the principal focus.

• The principal focus of a converging lens is where rays hitting the lens parallel to the axis all meet

Diverging Lens

• A diverging lens is a concave-it caves inwards

• Causes parallel rays of light to diverge.

• The principle focus is the point where rays hitiing the lens parallel to the axis appear to all come from-you can trace them back until they all appear to meet up at a point behind the lens.

Rules for Refraction

Converging lens

• An incident ray parallel to the axis refracts through the lens and passes…