Ray Diagrams Convex Lens. Convex means it kind of opens outward. The distance from the lens to the principal focus is called the focal.
So remember concave means it opens inward like a cave. You can see a listing of all my videos at my website http www stepbystepscienc. When a ray passing through focus strikes concave or convex lenses the reflected ray will pass parallel to the principal axis.
When an object is placed at infinity the real image is formed at the focus.
And in a convex lens it ll be symmetric. The distance from the lens to the principal focus is called the focal. The ray parallel to the principal axis passes through the focal point after refraction by the lens. When an object is placed at infinity the real image is formed at the focus.
