Optics
2 terms
Near Point & Far Point
Optics
m (or cm)
The closest and farthest distances at which the human eye can focus objects sharply on the retina.
Near Point ≈ 25 cm (Normal adult eye), Far Point = ∞
Newton's Rings
Optics
m
An interference pattern of concentric bright and dark rings formed by an air film enclosed between a plano-convex lens and a flat glass plate.
r_m² = m λ R (Dark rings in reflection)