Constructing the images produced by lenses
We can construct the images by the same principles that we used in curved mirrors
If the lens are ideal ones for each object point we have one image point
Following two special rays are enough to get the picture
special rays: - 1. going through the center of the lens (no refraction);
-2. through the focal point (parallel to the optical axis);
- 3. parallel with the optical axis (through the focal point)