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OpenStudy (anonymous):
Dish antennas have a parabolic cross-section. This concentrates signals onto a sensor at the focus of the parabola. A dish antenna is 1 meter wide and 20 centimeters deep. How far from the bottom of this dish should the sensor be positioned?
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OpenStudy (anonymous):
can someone please help?
OpenStudy (cwrw238):
the focus of the parabola y^2 = 4ax is at (a,0)
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