Physics – Leaving Cert
The most important topic in the study of refraction is that of lenses. Within a lens, the light bends on entering the lens and again on exiting the lens.
There are two main types of lenses
As a lens has two refracting surfaces, a lens has two focal points, one on either side of the lens.(Note – for lenses we don’t talk about C, we talk about the position 2F)
The midpoint of the lens is called the ...