A radar antenna is constructed so that a cross section along its axis is a parabola with
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A radar antenna is constructed so that a cross section along its axis is a parabola with the receiver at the focus. Find the focus if the antenna is \(12 \mathrm{~m}\) across and its depth is \(4 \mathrm{~m}\), as shown in Figure 15.43.
Figure 15.43
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