Each deliberately low-tech apparatus, of which there are about 400, is composed of a monofrequency light source and a parabolic mirror.
32.
The parabolic mirror reflects parallel light rays entering the telescope to its focus, which is also the focus of the hyperbolic mirror.
33.
Actress Maria Nafpliotou played the role of the High Priestess and ignited the flame using a parabolic mirror and the sun's ray.
34.
Proponents of the solar bowl design claim the reduction in overall power output compared with tracking parabolic mirrors is offset by lower system costs.
35.
Gregory pointed out that a reflecting telescope with a parabolic mirror would correct spherical aberration as well as the chromatic aberration seen in refracting telescopes.
36.
It consisted of 17 silver-plated, copper, parabolic mirrors, at the focal points of which were burners, each with its own oil tank of rapeseed oil.
37.
Concave horizontal parabolic mirrors may be formed by rotating liquid mercury on a disk, the parabolic form of the liquid thus formed reflecting and focusing incident light.
38.
From top : Parabolic mirror showing Foucault shadow patterns made by knife edge inside radius of curvature R ( red X ), at R and outside R.
39.
Each position lamp unit is equipped with a 12 volt, 6 candlepower bulb mounted in front of a parabolic mirror that increases the relatively weak bulb's intensity.
40.
With the correct positioning of the lens, a parabolic mirror appears flat under testing instead of doughnut-shaped so testing is much easier and zonal measurements are not needed.
