Linked from
The 55 pages that link to Refraction, each with the reason it gives.
Focal lengthNarrower topic: Refraction is how lenses redirect light to produce their focal behavior.
Snell's lawNarrower topic: Snell's law quantifies the direction change at a boundary.
DiopterNarrower topic: Refraction at lens surfaces produces the focusing measured by optical power.
Ibn SahlNarrower topic: This is the optical phenomenon Ibn Sahl analyzed quantitatively.
Sun dogNarrower topic: Sun dogs are a visible result of light changing direction inside ice.
LoupeNarrower topic: Refraction at the loupe's surfaces bends light to form its enlarged view.
Thin lensNarrower topic: A lens focuses light through refraction at its surfaces.