Compare mirrors and lenses as image-forming systems, then use diffraction limits to understand why real instruments cannot resolve arbitrarily fine detail.
Use this topic when you want image formation without the wider wave-optics branch. The page compares reflection-based and lens-based imaging first, then closes with the resolution limit that explains why apertures and wavelength still matter for real optical systems.
Best first concepts
The topic page keeps these starts in their own compact row so the first screen is about orientation and next action, not stacked feature cards.
Use plane, concave, and convex mirrors to track equal-angle reflection, signed image distance, and magnification on the same live ray diagram.
Mirror imaging
Strong first stop for getting into this topic without scanning the whole library.
Trace principal rays through converging and diverging lenses, connect the signed thin-lens equation to the diagram, and watch image distance and magnification respond to the same object setup.
Thin lenses
Strong first stop for getting into this topic without scanning the whole library.
Grouped concept overview
Each group is authored in the topic catalog, but the actual concepts, progress badges, and track cues still come from the canonical concept metadata and shared progress model.
Group 01
Compare reflected and refracted image formation first so the ray and image conventions stay visible together.
Use plane, concave, and convex mirrors to track equal-angle reflection, signed image distance, and magnification on the same live ray diagram.
Strong first stop for getting into this topic without scanning the whole library.
Trace principal rays through converging and diverging lenses, connect the signed thin-lens equation to the diagram, and watch image distance and magnification respond to the same object setup.
Strong first stop for getting into this topic without scanning the whole library.
Group 02
Finish with the diffraction-limited resolution story that caps what real mirrors and lenses can separate.