Parallel rays rule An object at infinity is imaged on the focal plane. Large, long focal length, converging lens Smaller source. Do ray tacing. Object closer than focal point, image is virtual, larger, not inverted. Three ray tracing rules for diverging lenses 1.
Parallel rays coming in parallel to axis appear to come from the first focal point.
The ray that passes through the center continues on straight. Rays aimed towards the second focal point emerge parallel. Do ray tacing. 3.4B. Ball of water forms a spherical lens. This is the reason we mix glass beads in with the paint when painting streets.