| 1 | The said lens is perpendicular to output beam. Each concave mirror possesses identical radius of curvature. | |
| 2 | The flame is lit at the ancient site of Olympia by the natural rays of the sun reflected off a curved mirror. | |
| 3 | Put a solar cell at the focus of that mirror and you have an inexpensive solar-energy collector. | |
| 4 | Put a solar cell at the focus of that mirror and you have an inexpensive solar-energy collector. | |
| 5 | The priestess holds a torch in the center of the parabolic mirror, and the heat ignites the fuel in the torch, sparking a flame. |
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