# Concave Lens Ray Diagram

Concave Lens Ray Diagram. Pick a point on the top of the object and draw three incident rays traveling towards the lens. To draw a ray diagram you only need to draw two ray lines. PPLATO | FLAP | PHYS 6.3: Optical elements: prisms, lenses ... (Betty Green) Like in all ray diagrams, images can be found using two rays. Simply knowing the thin lens formula for convex lens is not enough. Draw at least two light rays to locate the image produced by the lens and draw in the image b.

### In this Case, Object is kept far away from mirror (almost at infinite distance).

For such a lens, focal length, image distance and object distance are interconnected.

There are two types of Below is an experiment to find the image distance for varying object distances of a convex lens with ray diagrams. Pick a point on the top of the object and draw three incident rays traveling towards the lens. Convex lens forms real image because of positive focal length and concave lens forms virtual image because of negative focal length.