the.com/parabola
the curve that catches everything thrown and reflects everything aimed back to one perfect point
means A symmetrical U-shaped curve formed by slicing a cone parallel to its side, and the path traced by anything thrown under gravity.
from From Greek 'parabolē,' a 'placing beside' or 'comparison' (para-, 'beside,' plus ballein, 'to throw'). The geometer Apollonius of Perga gave it this name from how the curve relates to a fixed line — and the same Greek word, traveling a different road, also gave us 'parable,' that other thing thrown alongside to illuminate by comparison.
- satellite dishes
- Parabolic shape focuses signals onto a single receiver
- thrown anything
- Every object you toss traces a parabola falling
- ancient roots
- Menaechmus discovered it around 350 BC
- car headlights
- Bulb at focus throws light in straight beams
- death ray legend
- Archimedes allegedly burned ships with parabolic mirrors
gateway arch — 630-foot monument in st. louis follows an inverted catenary curve, often mistaken for a parabola
apollo 13 trajectory — spacecraft followed a parabolic path during its 1970 abort maneuver to return to earth
water fountain arc — jets at the trevi fountain in rome spray in parabolic arcs, visible to millions annually