Paraboloid concave reflector

Paraboloid concave reflector for heat and sound experiments. There is a casing for sources of heat or objects to be heated on the focus of the mirror. Suppose two mirrors like that are placed some meters apart, facing each other, and with their axes in the same straight line. In the focus of one mirror is placed a flammable substance and in the focus of the other a small furnace. The flammable substance will be set on fire.


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